Persistent itching has many possible explanations, including eczema, allergies, kidney disease, liver disease, medication reactions, and other dermatological conditions.
If the problem continues despite basic skin care, a medical assessment can help identify the cause rather than simply treating the symptom.
4. Recurrent Fungal Infections
Repeated fungal infections can sometimes be another clue worth investigating.
Fungal infections may affect the feet, groin, skin folds, and areas between the toes. They can cause itching, redness, scaling, cracking, and discomfort.
One particularly common infection is candidiasis, which is caused by yeast belonging to the Candida group.
It may develop in warm, moist areas of the body, including beneath the breasts, around the groin, and in skin folds.
Why are people with diabetes more vulnerable?
Elevated blood glucose can create conditions that favor the growth of certain microorganisms. Diabetes may also interfere with immune defenses, making it more difficult for the body to control some infections.
When glucose levels are poorly controlled, recurrent fungal infections may become more likely.
For example, someone might repeatedly experience an itchy rash in the groin despite using treatments that temporarily improve the symptoms.
The infection may return because the underlying conditions that contribute to it have not been addressed.
This does not mean every fungal infection indicates diabetes. These infections are common and can affect people of all ages.
However, recurring, unusually persistent, or difficult-to-treat fungal infections may justify a broader health evaluation, particularly when other diabetes risk factors are present.
5. Frequent Bacterial Skin Infections
Bacterial infections can affect almost any part of the skin.
Examples include boils, infected hair follicles, inflamed wounds, and deeper skin infections such as cellulitis.
Symptoms may include redness, swelling, warmth, tenderness, pus, and sometimes fever.
Although these conditions can occur in anyone, people with diabetes may be more vulnerable to certain infections, especially when blood glucose is poorly controlled.
Why does diabetes matter?
High blood glucose can interfere with several aspects of immune function. Diabetes may also impair circulation and wound repair, making it harder for the body to respond to infection and recover from tissue damage.
A small skin injury can sometimes develop into a more serious problem if bacteria enter the damaged area.
Repeated boils or infections that seem unusually difficult to treat should not be ignored.
This is particularly important for people who have known diabetes, reduced sensation in their feet, or circulation problems.
Seek prompt medical care for spreading redness, increasing pain, swelling, fever, pus, or rapidly worsening skin changes. A suspected skin infection should not be left untreated while waiting to see whether it disappears on its own.
6. Cuts and Wounds That Take Too Long to Heal
A minor cut usually begins repairing itself shortly after the injury occurs.
The body activates a complex process involving blood clotting, inflammation, immune cells, and the production of new tissue.
For people with diabetes, this process may become less efficient.
A small wound that would normally heal within a relatively short period may remain open, repeatedly become irritated, or develop signs of infection.
What causes delayed healing?
Several diabetes-related changes can contribute.
First, persistently elevated blood glucose can interfere with normal immune responses and tissue repair.
Second, diabetes may damage blood vessels, reducing the delivery of oxygen and nutrients to affected areas.
Third, nerve damage can reduce sensation. A person may not notice a blister, cut, or pressure injury until it has become significantly worse.
These problems are particularly important in the feet.
A small blister caused by tight shoes may develop into an ulcer if pressure continues and the injury is not noticed.
When should you be concerned?
Pay attention to wounds that:
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Remain open longer than expected.
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Become increasingly red or swollen.
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Produce pus or an unpleasant odor.
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Develop dark or unusual discoloration.
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Cause increasing pain or tenderness.
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Repeatedly reopen after appearing to improve.
A wound that is not healing should be evaluated, particularly if it is on the foot.
Do not assume that a lack of pain means the wound is harmless. Nerve damage can reduce the ability to feel injuries.
7. Extremely Dry, Cracked Skin
Dry skin is one of the most common dermatological complaints, and it has many possible causes.
However, persistent dryness may occur more frequently in people with diabetes.
The skin may feel rough, tight, flaky, or uncomfortable. In more severe cases, it can develop cracks, particularly around the heels, hands, and lower legs.
How can diabetes contribute?
Poorly controlled blood glucose may contribute to dehydration through increased urination.
Diabetes-related nerve damage can also affect sweating in certain areas, reducing the skin's natural moisture.
When the skin becomes excessively dry, its protective barrier may weaken. This can increase the likelihood of irritation and cracking.
Cracks are more than a cosmetic concern. They can create openings through which bacteria enter the skin.
For people with diabetes, particularly those with reduced foot sensation or circulation problems, even a small crack deserves attention.
Using a gentle, fragrance-free moisturizer may help maintain the skin barrier. However, moisturizer should not be applied between the toes if that area is already moist, as excessive moisture can encourage fungal growth.
If cracks become painful, infected, or difficult to heal, seek medical advice.
8. Small Brown Spots on the Shins
Another skin condition associated with diabetes is diabetic dermopathy.
It commonly appears as small, round or oval patches of light brown, reddish-brown, or slightly darker skin, most frequently on the front of the lower legs.
The spots may be slightly scaly or indented, although they are often flat and painless.