Wounds in people with diabetes, especially on the feet, tend to heal slowly and get infected more easily. Families often ask what the person should eat to help. Food helps in two main ways: it keeps blood sugar steady, and it provides protein for new tissue. No single food or powder does the healing.
Both are covered below in terms of ordinary Indian meals, along with one daily habit that probably matters more than any diet: checking the feet.
Why does diabetes slow wound healing?
Several things happen at once. High blood sugar weakens the white blood cells that fight infection, so bacteria get a foothold more easily. Over years, diabetes can narrow and damage blood vessels, so less oxygen and fewer nutrients reach the wound, especially in the feet and legs. Diabetes can also damage nerves (neuropathy), which means a person may not feel a blister, a cut or a tight shoe. They keep walking on the injury, and it gets worse without them noticing.
Food cannot reverse nerve or blood vessel damage. What it can do is keep blood sugar in a better range, which helps the immune system and the healing process, and supply the protein the body needs to rebuild tissue.
What blood sugar should you aim for?
The doctor sets the target for each person. For many adults, doctors aim for an HbA1c of around 7 percent, but targets are often relaxed for older people or anyone prone to low sugars. While a wound is healing, it helps to check sugar at home more often than usual and share the readings with the doctor, because an infection can push sugar up suddenly and medicines may need adjusting.
A sudden rise in sugar that is hard to bring down can itself be a sign of infection in the wound. Report it.
How should the plate be built?
A simple way to plan meals is the plate method, adapted to Indian food:
- Fill half the plate with non-starchy vegetables and salad: bhindi, lauki, tinda, cabbage, beans, cauliflower, spinach, methi, cucumber, tomato.
- Fill a quarter with protein: dal, chana, rajma, paneer, curd, egg, fish or chicken.
- Fill the last quarter with grains: one or two rotis, or about one katori of cooked rice, or a portion of millet such as jowar, bajra or ragi.
A katori of curd or buttermilk on the side fits well. This pattern keeps the carbohydrate portion measured while making sure protein appears at every meal, which is exactly what a healing wound needs.
Protein without spiking sugar
Protein foods raise blood sugar much less than rice, roti or sweets, so they are a safe place to add food for healing. Most adults with a wound need about 1.2 to 1.5 grams of protein per kilogram of body weight a day, and good choices include eggs, paneer, curd, fish, chicken, dal, sprouts, soya chunks and besan.
One important exception: kidney disease is common in people who have had diabetes for many years, and damaged kidneys may not cope with extra protein. Before raising protein, ask the doctor whether the person’s kidney tests (usually a blood test called eGFR and a urine albumin test) are normal, and what protein target suits them.
Which carbohydrates to cut and which to keep?
Some foods raise blood sugar quickly and are best kept to a minimum during recovery:
- sugar, mithai, jaggery and honey in large amounts
- fruit juices, cold drinks and sweetened tea or coffee
- biscuits, white bread and other foods made from maida
- large helpings of white rice or potato
Others are fine in measured portions, and the fibre in them slows the rise in sugar:
- whole-wheat roti, and millets such as jowar, bajra and ragi
- dalia, oats and brown rice
- whole pulses and dals
- all non-starchy vegetables
Some studies suggest that eating vegetables and protein first, and the rice or roti last, lowers the rise in sugar after a meal. It costs nothing to try.
Can someone with diabetes eat fruit?
Yes, in portions. Whole fruit brings vitamin C and fibre, both useful for healing. One portion at a time works well: a guava, an orange, a small apple, a pear, a slice of papaya or a handful of jamun. Mango, banana, chikoo and grapes raise sugar more, so keep those portions small. Eat fruit whole instead of as juice, and ideally with a meal or a few nuts.
Why should meals not be skipped?
People who take insulin or certain tablets, such as glimepiride or gliclazide, can get dangerously low sugar if they skip a meal or eat much less than usual. This matters during wound recovery, when appetite often drops.
Signs of low sugar include sweating, shaking, a racing heart, sudden hunger, confusion or unusual behaviour. If this happens and the person can swallow safely, give about 15 grams of fast sugar, such as three teaspoons of sugar or glucose dissolved in water, or half a glass of fruit juice. Check sugar again after 15 minutes and repeat if it is still low, then give a snack. If the person is too drowsy to swallow, do not put anything in their mouth and get emergency help.
If appetite is poor or the person is fasting for religious reasons, tell the doctor, who may adjust the medicine doses. Do not stop or change diabetes medicines without advice.
What about supplements for a diabetic foot wound?
Many products are sold for diabetic wounds. The international guidelines on diabetic foot ulcers, published by the IWGDF in 2023, advise against giving protein, vitamin or mineral supplements as a treatment aimed at healing a diabetic foot ulcer, because trials have not shown that they help these wounds close.
That does not mean nutrition is irrelevant. If the person is undernourished, has lost weight, or is short of a particular nutrient, that should be found and corrected, and a doctor or dietitian can check. The foundation is still ordinary food: steady sugar, enough protein, vegetables and fruit, and good wound care.
A daily foot-check routine
For people with diabetes, a daily look at the feet catches problems while they are small. It takes two minutes:
- Check both feet every day in good light, including the soles, heels and between the toes. Use a mirror, or ask a family member to look.
- Look for cuts, blisters, cracks, red or dark patches, swelling, and changes in the nails.
- Feel both feet. A spot that is warmer than the same spot on the other foot can be an early sign of trouble.
- Wash the feet daily in lukewarm water. Test the water with an elbow, not the foot, because numb feet cannot judge heat.
- Dry carefully, especially between the toes, and apply moisturiser to dry heels but not between the toes.
- Never walk barefoot, even at home.
- Shake out and check shoes before putting them on, and choose footwear that does not rub or pinch.
- Do not cut corns or calluses yourself, use blades or corn caps, or put hot water bottles or heating pads on the feet.
When should you get help?
For someone with diabetes, any new wound, blister or cut on the foot should be seen by a doctor within a day or two, even if it looks small. Get help the same day if you notice:
- redness, warmth or swelling spreading around a wound
- pus, fluid or a bad smell
- skin turning black, blue or grey
- fever, chills or feeling generally unwell
- blood sugar that is suddenly high and hard to bring down
- new pain in the foot or leg, especially at rest
The bottom line
For a person with diabetes, food supports a healing wound mainly by keeping blood sugar steady and providing enough protein. Build meals around vegetables and protein, keep rice and roti portions measured, choose whole fruit over juice, and do not skip meals if the person takes insulin or sugar-lowering tablets. Check the kidneys before raising protein, check the feet every day, and get any foot wound seen quickly.
For practical meal ideas, see a day of meals for wound healing and cheap protein foods. If a wound is not improving, why a wound may not be healing explains what else to check.