Yes, itchy skin can be a sign of diabetes. Approximately 30% of people with diabetes develop skin-related symptoms, and itching (pruritus) is one of the more common ones. In some cases, persistent itching is the first noticeable clue that blood sugar levels are off. The connection runs deeper than most people realize, involving dry skin, nerve damage, reduced circulation, and a higher vulnerability to skin infections.
Why Diabetes Causes Itchy Skin
Prolonged high blood sugar triggers a chain of changes in the skin. When glucose stays elevated, the body pulls water from cells to dilute the excess sugar in the bloodstream. Skin cells lose moisture in this process, and the oil glands that normally keep skin supple start underperforming. Insulin signaling plays a direct role here: impaired insulin reduces the production of natural oils and fats from the skin’s sebaceous glands.
Over time, high blood sugar also causes sugar molecules to attach to proteins in the skin, including collagen and elastin. This process stiffens the skin and disrupts its barrier function, making it harder for the outermost layers to hold onto moisture. The result is chronically dry, flaky skin, a condition called xerosis, which is significantly more advanced in people with diabetes who report itching compared to those who don’t.
Research shows that people with diabetes who experience itching tend to have higher fasting blood glucose levels than those without itching. The primary driver appears to be prolonged poor blood sugar control, which sets off a cascade of dryness and nerve changes that make the itch worse over time.
Nerve Damage and Phantom Itching
Diabetes gradually damages small nerve fibers throughout the body, particularly in the feet and lower legs. This is peripheral neuropathy, and while most people associate it with tingling, numbness, or burning, it can also cause persistent itching with no visible rash or skin change. The itch comes from the nerves themselves misfiring, not from anything happening on the skin’s surface.
This type of itch is tricky to diagnose. Standard nerve conduction tests evaluate large nerve fibers but often miss the smaller sensory fibers responsible for transmitting itch and pain signals. So even when test results come back normal, the finer nerves may still be involved. People with diabetes who itch are significantly more likely to also have neuropathy than those who don’t itch.
Skin Infections That Cause Itching
High blood sugar creates an ideal environment for fungal and bacterial infections, both of which cause itching. A yeast called Candida albicans is the most common culprit. It thrives in warm, moist skin folds: under the breasts, between fingers and toes, around nailbeds, in the armpits, and in the groin. These infections show up as moist patches of tiny red blisters or scales that itch persistently.
Other common fungal infections in people with diabetes include jock itch, athlete’s foot, and ringworm. Vaginal yeast infections are also more frequent. If you’re getting recurring fungal infections in these areas and haven’t been tested for diabetes, it’s worth checking your blood sugar.
Poor Circulation Plays a Role
Diabetes increases the risk of peripheral artery disease, where narrowed blood vessels reduce blood flow to the extremities. Without adequate circulation, skin cells can’t renew at a normal pace. The skin on the lower legs and feet becomes dry, scaly, and itchy. You might also notice the skin looks shiny or feels thinner than usual. This type of itch tends to be localized to the legs and feet rather than widespread.
Where and How the Itch Typically Shows Up
Diabetes-related itching doesn’t always follow one pattern. It can be generalized (all over the body) or concentrated in specific areas. The lower legs, feet, and skin folds are the most common sites. Some people notice it mainly at night, when dry skin worsens and there are fewer distractions from the sensation.
In some cases, itching accompanies visible skin changes linked to diabetes. Eruptive xanthomatosis, for example, produces small yellow-red, waxy bumps on the buttocks, shoulders, arms, and thighs. These bumps can be itchy and tender, and they’re associated with very high blood triglyceride levels, which frequently occur alongside diabetes. Acanthosis nigricans, the dark, velvety patches that appear on the neck and armpits, affects roughly half of people with diabetes and can also itch.
As many as 70% of people with diabetes will develop some type of skin symptom over the course of the disease. Not all of these itch, but the sheer range of skin involvement means that unexplained itching, especially alongside other subtle signs like increased thirst, frequent urination, or slow-healing cuts, deserves a closer look.
Managing Diabetes-Related Itching
The most effective long-term strategy is getting blood sugar under control. Because elevated glucose is the root cause of the dryness, nerve damage, and infection risk that trigger itching, stabilizing blood sugar addresses the problem at its source rather than just masking symptoms.
For day-to-day relief, moisturizing matters more than most people think. Look for fragrance-free creams and lotions containing urea, ceramides, or lactic acid. Urea is a particularly useful ingredient for diabetic skin because it both draws moisture into the skin and helps shed the dry, scaly buildup that causes itching. Ceramides help restore the skin’s natural barrier. Apply moisturizer right after bathing, while skin is still slightly damp, to lock in hydration.
A few practical habits also help. Use lukewarm water instead of hot water when showering, since heat strips natural oils from the skin. Choose mild, fragrance-free cleansers. Avoid scratching, which can break the skin and open the door to infections that are harder to fight when blood sugar is high. For localized fungal infections, over-the-counter antifungal creams can help, but recurring infections are a signal that blood sugar management needs attention.
If itching persists despite good moisturizing and improved blood sugar, a nerve-related cause is more likely. This type of itch doesn’t respond well to typical anti-itch creams because the problem originates in the nerves rather than the skin. Treatments that target nerve pain, which a doctor can prescribe, tend to be more effective in these cases.