Last updated: August 23, 2026
Written and source checked by: Adel Galal, Founder and Lead Writer at NextFitLife
Clinical review status: This article has not been medically reviewed by a doctor, endocrinologist, podiatrist, cardiologist, or kidney specialist.
Diabetes and swollen feet can happen together.
But diabetes is not the only probable cause of swollen feet.
Swelling is often caused by fluid collecting in the tissues.
This is called peripheral edema.
A person with diabetes may develop swelling because of kidney disease, heart problems, vein disease, medicines, infection, injury, or another condition.
Diabetes can also cause diabetic neuropathy and poor blood flow.
These problems raise the risk of wounds, infection, and serious foot complications.
A red, warm, swollen foot can sometimes be a sign of Charcot foot.
Sudden swelling in one leg can also point to a blood clot.
This is why new swelling should not be treated only with home remedies.
Get urgent medical help if swollen feet come with chest pain, trouble breathing, coughing blood, fainting, severe weakness, sudden swelling in one leg, a red hot painful leg, a rapidly worsening foot infection, or a red hot swollen foot with diabetic nerve damage.
Why Do People With Diabetes Get Swollen Feet?
There is no single answer.
Swollen feet with diabetes may be caused by:
- Kidney disease
- Heart failure
- Vein problems
- A blood clot
- Infection
- Injury
- Long periods of sitting or standing
- Some medicines
- Obesity
- Pregnancy
- Charcot foot
Diabetes itself can damage nerves and blood vessels.
But diabetic neuropathy should not be used as a simple explanation for every swollen foot.
The cause needs to be identified.
What Does Swelling in the Feet Mean?
Swelling often means extra fluid has collected in the tissues.
This is called edema.
It may affect:
- One foot
- Both feet
- The ankles
- The lower legs
- The calves
The skin may look stretched or shiny.
Your shoes may feel tight.
Your socks may leave deep marks.
If you press the swollen skin, a dent may remain for a short time.
This is called pitting edema.
Is Swollen Feet a Sign of Diabetes?
Not by itself.
Swelling is not a standard way to diagnose diabetes.
Diabetes is diagnosed with blood glucose testing.
Common diabetes symptoms can include thirst, frequent urination, fatigue, hunger, and unexplained weight change.
Swollen feet need their own evaluation.
How Can Diabetes Affect Your Feet?
Diabetes can affect the nerves and blood vessels in your feet.
Diabetic Neuropathy
Diabetic neuropathy can cause:
- Numbness
- Tingling
- Burning
- Pain
- Loss of feeling
Loss of feeling is important.
You may not notice a blister, cut, burn, or pressure injury.
A slight wound can become infected.
Poor Blood Flow
Diabetes raises the risk of blood vessel disease.
Poor circulation can make wounds harder to heal.
It can also increase the risk of serious foot problems.
If your feet are cold, numb, painful, change colour, or develop slow-healing sores, read our Poor Circulation in Feet guide.
Foot Ulcers
A diabetic foot ulcer is an open sore.
Neuropathy and poor circulation can make ulcers more likely.
They can also make healing harder.
Do not ignore a sore because it does not hurt.
Nerve damage may reduce pain.
10 Causes of Swollen Feet With Diabetes
1. Sitting or Standing for a Long Time
Gravity can allow fluid to collect in the feet and ankles.
This may happen after a long workday or long trip.
Mild swelling may improve with movement and elevation.
2. Too Much Sodium
Sodium can increase fluid retention in some people.
Reducing excess sodium may help when fluid retention is part of the problem.
There is no single sodium target that is right for every person with diabetes.
Kidney disease, heart disease, blood pressure, medicines, and other factors can change the target.
Ask your healthcare professional what amount is right for you.
3. Kidney Disease
Diabetes is a major cause of chronic kidney disease.
Damaged kidneys may have trouble removing extra sodium and fluid.
This can lead to swelling.
4. Heart Failure
Heart failure can cause fluid to collect in the legs, ankles, and feet.
Shortness of breath and rapid weight gain can occur too.
5. Venous Insufficiency
Venous insufficiency means the veins have trouble moving blood back toward the heart.
This can cause ankle and leg swelling.
It may be worse after standing.
6. Deep Vein Thrombosis
A deep vein thrombosis is a blood clot in a deep vein.
It often affects one leg.
The leg may become:
- Swollen
- Painful
- Warm
- Red or darker than usual
Suspected blood clots need urgent medical assessment.
7. Foot or Leg Infection
Diabetes can make infections more serious.
A foot infection may cause:
- Swelling
- Redness
- Warmth
- Pain
- Drainage
- Bad smell
- Fever
People with neuropathy may have little pain even when an infection is serious.
8. Charcot Foot
Charcot foot is a serious complication linked with severe nerve damage.
The foot may suddenly become:
- Red
- Warm
- Swollen
There may be surprisingly little pain.
Bones and joints can weaken and change shape if it is not treated.
A red, warm, swollen foot in someone with diabetic neuropathy needs prompt medical assessment.
9. Injury
A sprain, fracture, bruise, burn, or wound can cause swelling.
Nerve damage can make an injury harder to feel.
Check your feet every day.
10. Medicines
Some medicines can cause or worsen swelling.
Examples can include some:
- Blood pressure medicines
- Steroids
- Hormone treatments
- Anti inflammatory medicines
- Antidepressants
Do not stop a prescribed medicine because you think it causes swelling.
Ask your doctor or pharmacist to review it.
Diabetes, Kidney Disease and Swollen Feet
Diabetic kidney disease can develop slowly.
Early kidney disease may cause no symptoms.
As kidney function becomes worse, salt and fluid may build up.
This can cause swollen ankles, feet, or legs.
Other Kidney Warning Signs
Possible clues include:
- Foamy urine
- Protein in urine
- High blood pressure
- Puffy eyes
- Fatigue
- Changes in urination
These symptoms are not proof of kidney disease.
Blood and urine tests are needed.
What Kidney Tests May Be Used?
People with diabetes may need tests such as:
- eGFR
- Blood creatinine
- Urine albumin
- Urine albumin to creatinine ratio
- Blood pressure
Read our Kidney Disease Symptoms guide for a full explanation.
Can Heart Problems Cause Swollen Feet?
Yes.
Heart failure can cause fluid to build up in the legs and feet.
The heart may not pump blood as effectively as the body needs.
Fluid can then collect in tissues.
Heart Failure Warning Signs
Possible symptoms include:
- Swollen feet
- Swollen ankles
- Swollen legs
- Shortness of breath
- Fatigue
- Rapid weight gain from fluid
- Difficulty breathing when lying flat
New swelling with breathing problems needs prompt medical attention.
Can Poor Circulation Cause Foot Swelling?
It depends on what is meant by poor circulation.
Artery disease and vein disease are different.
Peripheral Artery Disease
Peripheral artery disease reduces blood flow through arteries.
Possible signs include:
- Cold feet
- Pain when walking
- Slow healing sores
- Weak foot pulses
- Skin color changes
Venous Disease
Vein problems can cause blood and fluid to collect in the legs.
This is more directly linked with leg and ankle edema.
Swelling may become worse after standing.
Why Does One Swollen Foot Matter?
Sudden swelling on one side deserves more attention.
Possible causes include:
- A blood clot
- Infection
- Injury
- Charcot foot
Do not assume sudden one sided swelling is simple fluid retention.
What Is Charcot Foot?
Charcot foot is a serious condition that can happen when nerve damage reduces normal feeling.
Bones in the foot can weaken.
Small injuries may go unnoticed.
The foot can become inflamed.
Early Charcot Foot Signs
Watch for:
- A warm foot
- Redness
- Swelling
- A clear temperature difference between the feet
- Change in foot shape
Pain may be mild or absent.
This can make the problem easy to miss.
Do not keep walking normally on a possible Charcot foot while waiting for it to improve.
Get prompt professional assessment.
How Do You Know if a Diabetic Foot Is Infected?
A foot infection may start from a small cut, blister, crack, or ulcer.
Possible warning signs include:
- Redness
- Warmth
- Swelling
- Drainage
- Bad smell
- A new wound
- Skin color change
- Fever
Do not wait for severe pain.
Neuropathy can reduce pain sensation.
What About Black or Blue Skin?
New dark, black, blue, or very pale skin can signal a serious circulation or tissue problem.
Seek urgent medical care.
Can Diabetes Medicine Cause Swollen Feet?
Some medicines used by people with diabetes can contribute to fluid retention.
But the answer depends on the exact medicine.
Other medicines for blood pressure, inflammation, hormones, or other conditions can also cause edema.
Bring a full medicine list to your appointment.
Include:
- Prescription medicines
- Nonprescription medicines
- Herbal products
- Supplements
Do not stop or change medicine on your own.
How Do Doctors Find the Cause of Swollen Feet?
The first step is looking for the pattern.
A healthcare professional may ask:
- Is one foot swollen or both?
- Did the swelling start suddenly?
- Is the area painful?
- Is it warm or red?
- Do you have shortness of breath?
- Have you gained weight quickly?
- Do you have kidney disease?
- Do you have heart disease?
- Have you been sitting for a long time?
- What medicines do you take?
Foot Examination
The clinician may check:
- Skin color
- Temperature
- Swelling
- Foot pulses
- Feeling in the feet
- Wounds
- Toenails
- Foot shape
Tests That May Be Needed
The right tests depend on the suspected cause.
They may include:
- Blood glucose
- A1C
- Kidney function tests
- eGFR
- Urine albumin
- Urinalysis
- Liver tests
- Blood count
- Electrocardiogram
- Heart testing
- Vein ultrasound
- Foot imaging
A Doppler ultrasound may be used if a blood clot is suspected.
Learn more about laboratory and diagnostic testing in our Medical Tests and Screenings Guide.
How Are Diabetes and Swollen Feet Treated?
Treatment depends on the cause.
There is no single treatment for every swollen diabetic foot.
If the Cause Is Mild Fluid Buildup
Gentle movement and raising the legs may help some people.
Reducing excess sodium may also help when sodium-related fluid retention is present.
If Kidney Disease Is the Cause
Treatment focuses on kidney health.
This may include:
- Blood pressure control
- Diabetes management
- Kidney protective medicine when appropriate
- Personal sodium guidance
- Fluid advice when needed
A kidney specialist may be needed for more advanced disease.
If Heart Failure Is the Cause
Heart failure needs medical treatment.
Medicines and fluid or sodium advice depend on the individual.
Do not treat suspected heart failure with home remedies alone.
If a Blood Clot Is the Cause
A blood clot needs medical treatment.
Do not massage a suddenly swollen, painful leg.
If Infection Is the Cause
Infection may need antibiotics, wound treatment, or other care.
Severe diabetic foot infections may need hospital treatment.
If Charcot Foot Is Suspected
The foot often needs pressure removed from it.
Specialist foot care is important.
Early treatment can help prevent permanent deformity.
If Medicine Is Causing the Swelling
Your clinician may review the dose or choose another medicine.
Do not make the change yourself.
What Can You Safely Do for Mild Foot Swelling?
These steps may help mild swelling when a serious cause has been ruled out.
Raise Your Legs
Raise your feet when sitting or lying down.
This can help some forms of dependent edema.
Move Often
Do not sit in one position all day.
Move your ankles.
Wiggle your toes.
Walk when it is safe for you.
Wear Comfortable Shoes
Choose shoes that fit well.
They should not rub or squeeze swollen areas.
Reduce Excess Salt if Appropriate
Avoid very salty food if your healthcare professional recommends sodium reduction.
Do not assume everyone needs the same sodium limit.
Do Not Overdrink Water
Water does not automatically flush edema away.
People with heart failure or kidney disease may have a fluid limit.
Follow your medical plan.
Should You Wear Compression Socks?
Compression can help some vein-related swelling.
But compression is not right for every person.
People with poor artery blood flow may need special assessment first.
If you have diabetes, neuropathy, wounds, severe swelling, or poor circulation, ask a healthcare professional before starting strong compression stockings.
Should You Take Water Pills?
Do not start diuretics on your own.
Water pills are useful for some causes of edema.
They can also affect kidney function, blood pressure, sodium, potassium, and hydration.
They should be used for the right reason.
Do Pain Medicines Reduce Diabetic Foot Swelling?
Do not use ibuprofen, naproxen, or another anti inflammatory medicine just to treat unexplained edema.
These medicines can affect the kidneys and may worsen fluid retention in some people.
Ask a doctor or pharmacist what is safe for you.
Do Supplements Reduce Swelling?
Do not rely on horse chestnut, grape seed, herbs, detox products, or circulation supplements to treat unexplained foot swelling.
They do not replace diagnosis.
Some can interact with medicine.
Daily Diabetic Foot Care
Good diabetic foot care can prevent serious problems.
Check Your Feet Every Day
Look for:
- Cuts
- Blisters
- Red spots
- Swelling
- Warm areas
- Cracks
- Ulcers
- Drainage
- Color changes
Use a mirror to see the bottoms of your feet.
Wash Your Feet Gently
Use warm water.
Do not use very hot water.
Dry your feet well.
Dry between the toes.
Do Not Soak Your Feet for Long Periods
Long soaking can dry and damage the skin.
Do Not Use a Heating Pad on Numb Feet
Neuropathy may stop you from feeling a burn.
Wear Shoes and Socks
Do not walk barefoot if you have diabetes and reduced foot sensation.
Check inside shoes for stones or rough objects.
Do Not Cut Corns or Calluses Yourself
Sharp tools and chemical corn removers can injure the skin.
Ask a podiatrist for help.
Get Regular Foot Checks
Your healthcare team should assess foot risk.
More frequent checks may be needed if you have neuropathy, poor blood flow, a past ulcer, or previous amputation.
How Can You Reduce the Risk of Diabetes Foot Problems and Swelling?
Manage Blood Sugar
Good diabetes care helps protect nerves, kidneys, and blood vessels.
Your glucose and A1C targets should be personal.
Follow your diabetes care plan.
Control Blood Pressure
Blood pressure control helps protect the heart, kidneys, and blood vessels.
Check Kidney Health
People with diabetes should ask when they need kidney testing.
This can include eGFR and urine albumin testing.
Stop Smoking
Smoking damages blood vessels.
It can reduce blood flow to the feet.
Stay Active
Regular movement supports circulation, blood glucose, blood pressure, and heart health.
Choose activity that is safe for your feet.
Do not walk for exercise on an untreated foot ulcer or suspected Charcot foot.
Keep a Healthy Weight When Appropriate
Weight management can support diabetes, heart, vein, and joint health.
A safe plan should fit your medicines and health conditions.
Review Your Medicines
Ask whether any medicine may contribute to swelling.
Look at Your Feet Every Day
Early changes are easier to treat.
This matters even when the feet do not hurt.
When Should You See a Doctor for Swollen Feet With Diabetes?
Contact a healthcare professional if:
- Swelling is new
- Swelling keeps returning
- Both feet stay swollen
- The swelling is getting worse
- Your shoes suddenly stop fitting
- You have kidney or heart disease
- You have a new foot wound
- You notice redness or warmth
- You have neuropathy
When Is Swelling Urgent?
Get prompt medical care if:
- One foot or leg suddenly swells
- The swollen area is red or hot
- The swelling is painful
- You have fever
- You have a red, warm, swollen foot with neuropathy
- A wound is draining
- The foot changes colour
- You have severe swelling
When Should You Seek Emergency Help?
Seek emergency medical care for:
- Chest pain
- Severe shortness of breath
- Coughing up blood
- Fainting
- Severe confusion
- Severe breathing difficulty
- A rapidly worsening serious infection
Common Myths About Diabetes and Swollen Feet
Myth: Diabetes always causes swollen feet
No.
Many people with diabetes never develop foot edema.
Swelling has many possible causes.
Myth: Swelling means my blood sugar is too high today
No.
One swollen foot cannot tell you your current glucose level.
Myth: Diabetic neuropathy always causes edema
No.
Neuropathy mainly causes nerve symptoms such as numbness, tingling, burning, and pain.
A swollen foot needs a broader assessment.
Myth: Compression socks are safe for everyone
No.
Some people with poor artery circulation or serious foot problems need assessment before using compression.
Myth: Drinking more water removes swollen feet
No.
The treatment depends on why fluid is building up.
Myth: Water pills are a quick fix
No.
Diuretics should be used only when they fit the cause and your medical plan.
Myth: A diabetic foot infection always hurts
No.
Neuropathy can reduce pain.
This is why daily foot checks matter.
References and Sources
The health information in this guide was checked against these open and trusted medical and public health sources.
- National Institute of Diabetes and Digestive and Kidney Diseases: Diabetes and Foot ProblemsNIH guidance on diabetic neuropathy, poor blood flow, foot ulcers, Charcot foot, daily foot checks, footwear, and prevention.
- Centers for Disease Control and Prevention: Your Feet and DiabetesPublic health guidance on diabetic nerve damage, foot ulcers, daily inspection, early treatment, and protecting the feet.
- National Institute of Diabetes and Digestive and Kidney Diseases: Chronic Kidney DiseaseNIH guidance explaining how advanced kidney disease and salt and fluid retention can cause swelling in the feet, ankles, and legs.
- National Heart, Lung, and Blood Institute: Heart Failure SymptomsNIH guidance on heart failure symptoms including swelling of the ankles, feet, and legs, shortness of breath, fatigue, and fluid related weight gain.
- MedlinePlus: Foot, Leg, and Ankle SwellingNational Library of Medicine guidance on edema, vein disease, blood clots, infection, heart and kidney causes, medicine-related swelling, testing, and emergency signs.
Conclusion
Diabetes and swollen feet can be connected.
But the cause should never be guessed.
Diabetes can damage nerves and blood vessels.
It can also raise the risk of kidney disease, heart disease, foot ulcers, infection, and Charcot foot.
Swelling can also come from vein disease, blood clots, medicines, injury, or long periods of sitting or standing.
Check your feet every day.
Protect the skin.
Manage your diabetes.
Keep kidney and heart checks up to date.
Do not self-treat unexplained edema with water pills, supplements, or strong compression.
Take action today: If you have diabetes and swollen feet, especially new or worsening swelling, arrange a medical assessment so the real cause can be found and treated.
Medical Disclaimer
I am not a dermatologist or a doctor, and this content does not replace professional medical advice.
What I share comes from real life experience, extensive research, and consultation with healthcare providers.
Always consult qualified medical professionals for diagnosis and treatment of any health condition.
I am also not an endocrinologist, podiatrist, vascular specialist, kidney specialist, cardiologist, pharmacist, registered dietitian, or emergency physician.
This article provides general education only.
It does not diagnose the cause of swollen feet.
It does not select diabetes medicine, diuretics, compression treatment, antibiotics, or another medical treatment.
New or worsening swelling should be assessed based on your individual symptoms and medical history.
Frequently Asked Questions About Diabetes and Swollen Feet
Why do diabetics get swollen feet?
There are many possible causes. Kidney disease, heart failure, vein disease, medicines, infection, injury, long periods of sitting, and Charcot foot can all cause swelling.
Does diabetes directly cause swollen feet?
Not always. Diabetes can contribute to conditions that cause swelling, but edema should not automatically be blamed on diabetes alone.
Does diabetic neuropathy cause swollen feet?
Neuropathy mainly causes numbness, tingling, burning, and pain. A swollen foot needs assessment for other causes, including Charcot foot, infection, injury, kidney disease, or circulation problems.
Can high blood sugar cause foot swelling?
High blood sugar over time can damage nerves, blood vessels, and kidneys. These complications can contribute to foot problems, but one episode of swelling does not tell you your blood sugar level.
Can diabetic kidney disease cause swollen feet?
Yes. Kidney disease can cause sodium and fluid to build up, leading to swelling in the ankles, feet, and legs.
Can heart failure cause swollen feet?
Yes. Heart failure can cause fluid to collect in the feet, ankles, and legs. Shortness of breath, fatigue, and rapid fluid related weight gain may also occur.
What is Charcot foot?
Charcot foot is a serious complication linked with diabetic nerve damage. The foot can become red, warm, and swollen while bones and joints weaken.
Does Charcot foot always hurt?
No. Severe neuropathy can reduce pain. A red, warm, swollen foot can be serious even when pain is mild.
What does a diabetic foot infection look like?
Possible signs include redness, warmth, swelling, drainage, bad smell, a new wound, skin color change, or fever.
Should I elevate swollen diabetic feet?
Elevation may help some mild forms of edema. It does not treat blood clots, infection, Charcot foot, heart failure, kidney disease, or other serious causes.
Are compression socks good for swollen diabetic feet?
They may help some vein related swelling. But people with poor artery circulation, neuropathy, wounds, or severe foot problems should get medical advice before using strong compression.
Can I take water pills for swollen feet?
Do not start diuretics without medical advice. They are useful for some causes but can affect kidney function, blood pressure, sodium, potassium, and hydration.
Does drinking more water reduce foot swelling?
Not necessarily. More water does not cure edema. People with kidney or heart disease may even need a personal fluid limit.
Does reducing salt help swollen feet?
Reducing excess sodium can help some forms of fluid retention. Your ideal sodium intake depends on your blood pressure, kidney health, heart health, and overall care plan.
Can a blood clot cause one swollen foot?
A deep vein blood clot can cause sudden swelling, pain, warmth, or color change in one leg. This needs urgent medical assessment.
Why are my feet swollen but not painful?
Painless swelling can occur with fluid retention, vein problems, heart or kidney disease, prolonged sitting, or some medicines. Diabetic neuropathy can also reduce your ability to feel pain.
What tests are used for swollen feet?
Testing depends on the suspected cause. It may include blood glucose, A1C, kidney tests, urine albumin, blood count, heart testing, vein ultrasound, or foot imaging.
How can I prevent diabetic foot problems?
Manage diabetes, check your feet every day, wear suitable shoes, avoid smoking, keep blood pressure controlled, get kidney checks, and report wounds, warmth, redness, or swelling early.
When should a diabetic see a doctor for swollen feet?
Seek medical advice for new, unexplained, persistent, or worsening swelling, especially if you have neuropathy, kidney disease, heart disease, a wound, redness, or warmth.
When are swollen feet an emergency?
Seek emergency help for swelling with chest pain, severe breathing problems, coughing blood, fainting, severe confusion, or rapidly worsening serious illness.
Health & wellness writer with 30+ years of experience in nutrition, fitness, and healthy aging. Founder of NextFitLife.com — evidence-based health guidance.
