Diabetic foot ulcers are wounds that form most often on the bottom of the foot in people with diabetes, and they usually start as something small — a blister, a callus, a dry crack, or a spot rubbed raw by a shoe. The single most effective daily habit is to look at both feet every single day, including the soles and between the toes, because nerve damage can keep you from feeling a problem until it has already become serious. Pair that daily check with well-fitted shoes, careful washing and drying, and never walking barefoot, and you have the core of what actually prevents these wounds.
Why Do Diabetic Foot Ulcers Happen In The First Place?
Two problems in diabetes work together to cause most foot ulcers: nerve damage and poor circulation.
Nerve damage, called peripheral neuropathy, is common in people who have lived with diabetes for years. When the nerves in the feet are damaged, you lose the ability to feel pain, pressure, heat, and small injuries. A pebble in your shoe, a hot bath, or a tight seam can damage skin without you noticing. Neuropathy also changes the shape of the foot over time, which creates new pressure points.
Poor circulation, called peripheral artery disease, is the second problem. When blood flow to the feet is reduced, skin heals more slowly and small injuries have less chance to close on their own. High blood sugar adds to this by weakening the body’s ability to fight infection and repair tissue.
Put those together and you get a situation where an injury happens without pain, goes unnoticed, and heals poorly. That is the recipe for an ulcer. It is also why prevention depends so heavily on daily habits — you cannot rely on pain to warn you.
What Should A Daily Foot Check Actually Look Like?
A daily check is not a quick glance. It means looking at the top, the bottom, the sides, and between every toe of both feet.
Use a mirror, or ask someone to help, if you cannot easily see the soles. Check for:
- Cuts, blisters, or scrapes
- Red or warm spots, especially over pressure areas
- Swelling on one foot but not the other
- Calluses or corns that are new or changing
- Ingrown or thickened toenails
- Dry, cracked skin, particularly around the heels
- Any change in color, including pale, red, or dark areas
- Anything stuck in the skin, like a splinter or a small object
The key insight many people miss: a callus is not just a cosmetic nuisance in diabetes. A callus is a sign that pressure is building up in that spot, and that pressure is what eventually breaks the skin down into an ulcer. A new or growing callus deserves attention from a clinician, not just a pumice stone.
If you find something, do not try to cut it, burn it, or treat it with over-the-counter corn removers. Those products contain acids that can damage skin that is already fragile. Clean the area gently, cover it with a clean dressing, and contact your care team if it does not look like ordinary intact skin.
How Do Shoes And Socks Fit Into Prevention?
Footwear is where a lot of ulcers start. A shoe that rubs in one spot, or an insole that has worn thin, can create a pressure injury during a normal day of walking.
Choose shoes that fit well at the widest part of the foot, with enough room in the toe box for your toes to move. Check the inside of your shoes with your hand before you put them on — every time. A small object or a folded seam can cause damage you will not feel.
Never walk barefoot, even indoors. Stubbing a toe on furniture or stepping on something sharp is a common way ulcers begin. Wear shoes or protective slippers around the house.
Socks matter too. Wear clean, dry socks without tight elastic bands or thick seams. Change them daily, and change them again if they get damp. Moisture softens skin and makes it easier to break down.
If you have neuropathy or a foot deformity, ask your clinician about therapeutic shoes or custom insoles. Medicare and many insurance plans cover therapeutic footwear for people with diabetes who meet certain criteria, usually related to documented neuropathy or a history of foot problems. This is one area where the evidence for benefit is reasonably consistent — reducing pressure on the foot reduces ulcer risk.
What Does Washing And Moisturizing Have To Do With It?
Clean, intact skin resists injury better than dry, cracked skin. That is the whole logic behind daily washing and moisturizing.
Wash your feet daily in lukewarm water with a mild soap. Test the water temperature with your elbow or hand, not your foot, because neuropathy can prevent you from feeling heat. Hot water can burn skin you cannot feel.
Dry your feet carefully, especially between the toes. Moisture trapped between toes encourages fungal growth and skin breakdown. Use a soft towel and pat rather than rub.
After drying, apply a moisturizing cream or lotion to the tops and bottoms of your feet and the heels. Do not apply it between the toes — that area should stay dry. Dry, cracked heels are a common entry point for infection.
Trim toenails straight across and file the edges. If you cannot see or reach your feet well, or if your nails are thick or deformed, have a podiatrist or trained clinician trim them. Cutting yourself is a real risk when sensation is reduced.
Does Blood Sugar Control Really Affect Foot Ulcer Risk?
Yes, and this is one of the better-established connections in diabetes care. Sustained high blood sugar damages nerves and blood vessels over time, which is the underlying process that makes feet vulnerable in the first place.
Keeping blood sugar within the range your care team recommends slows the development and progression of neuropathy. It also supports the body’s ability to heal and fight infection. This does not mean tight control eliminates all risk — some people develop neuropathy despite good control, and genetics and duration of diabetes play a role. But the general direction of the evidence is clear: better glucose control is associated with lower risk of neuropathy and its complications.
Other factors that raise risk include smoking, high blood pressure, high cholesterol, and longer duration of diabetes. Smoking in particular narrows blood vessels and reduces circulation to the feet. Stopping smoking is one of the most impactful things a person with diabetes can do for their feet.
How Often Should You See A Professional About Your Feet?
At minimum, have your feet examined by a clinician at least once a year. Many guidelines recommend a thorough foot exam at every diabetes visit, and more often if you have neuropathy, circulation problems, or a history of ulcers.
A professional exam checks sensation, pulses, skin condition, and foot structure. It can catch problems you cannot feel or see. If you have any of the following, you likely need more frequent professional care:
- Diagnosed peripheral neuropathy
- Peripheral artery disease or poor circulation
- A previous foot ulcer or amputation
- Foot deformities like bunions, hammertoes, or Charcot foot
- Vision problems that make it hard to inspect your own feet
See a clinician promptly — within a day or two, not weeks — if you notice any break in the skin, a new red or warm area, swelling, drainage, or a foul odor. Foot infections in diabetes can progress quickly. Early treatment is far easier than treating a deep infection.
What Daily Habits Actually Make The Biggest Difference?
If you take nothing else from this, take these habits. They are simple, they are supported by clinical consensus, and they address the main ways ulcers start.
- Inspect both feet every day, including the soles and between the toes
- Wear well-fitted shoes and clean socks, and never go barefoot
- Shake out and check inside shoes before putting them on
- Wash and dry feet daily, and moisturize except between the toes
- Trim nails straight across, or have a professional do it
- Keep blood sugar in your target range
- Do not smoke
- Get a professional foot exam at least yearly
- Act quickly on any new break in the skin
None of these habits is dramatic. That is the point. Diabetic foot ulcers are largely preventable through consistent, unglamorous daily attention. The people who avoid them are usually the ones who check their feet every day without exception — not the ones who do something heroic once a year.
Frequently Asked Questions
How often should I check my feet if I have diabetes?
Check both feet every single day, including the soles and between the toes. If you have neuropathy or circulation problems, daily checks are especially important because you may not feel an injury when it happens.
Can diabetic foot ulcers be prevented completely?
Not every ulcer can be prevented, but the large majority can be avoided with consistent daily foot care, proper footwear, and good blood sugar control. Risk is reduced, not eliminated, especially in people with advanced neuropathy.
What does a diabetic foot ulcer look like when it first starts?
It often begins as a small area of redness, a blister, or a callus that has broken open, usually on the bottom of the foot or over a pressure point. Any new break in the skin should be evaluated by a clinician promptly.
Is it safe to walk barefoot at home if I have diabetes?
No, walking barefoot is not recommended for anyone with diabetes, even indoors. Stepping on a small object or stubbing a toe can cause an injury you may not feel, which can develop into an ulcer.
