How Your Skin Warns You About Diabetes
Did you know that signs of diabetes can appear on your skin before other symptoms become obvious?
According to the Centers for Disease Control and Prevention, more than 38 million Americans have diabetes, and many do not know they have it. High blood sugar can affect circulation, nerves, and the immune system, all of which play an important role in keeping your skin healthy. As a result, many diabetes skin problems appear early and may serve as warning signs that blood sugar levels are elevated or poorly controlled.
Why and How Does Diabetes Affect Your Skin?
When blood sugar stays elevated, it can reduce circulation to the skin, damage the nerves that regulate skin function, weaken the immune system, and affect collagen and connective tissue. These changes can lead to diabetic skin conditions, including dryness, infections, discoloration, and slow-healing wounds.
10 Signs of Diabetes That Show Up On Skin
1. Dark, velvety skin on neck, armpit, or groin (Acanthosis Nigricans)
Thick, dark patches that appear in skin folds are often linked to insulin resistance, which causes skin cells to multiply faster than normal. If these patches appear suddenly or begin spreading, see a doctor, as they can be an early sign of prediabetes or type 2 diabetes.
2. Skin spots or lines (Diabetic Dermopathy)
These small, round, scaly patches develop when high blood sugar damages the small blood vessels supplying the skin. They are usually harmless on their own, but multiple patches on both shins can signal that blood sugar has been elevated for some time.
3. Painful skin that is swollen and hot (Skin Infections)
Bacterial and fungal infections are more common in people with diabetes because high blood sugar creates an environment where germs thrive and the immune system is less effective. Seek prompt care for any spreading redness, warmth, swelling, or pus. Infections can escalate quickly when blood sugar is uncontrolled.
4. Open sores and wounds, especially on the feet (Diabetic Ulcers)
Diabetic ulcers most often develop on the feet, where nerve damage can make injuries easy to miss and poor circulation prevents proper healing. Inspect your feet daily and contact your provider immediately if you notice any wound that is not closing. Untreated ulcers can lead to serious complications.
5. Yellowish patches around your eyelids that are scaly (Xanthelasma)
These soft, waxy deposits are made up of cholesterol and fat that accumulate under the skin, often linked to high triglycerides and poorly controlled blood sugar. If you notice them forming, ask your doctor for a blood work check of your cholesterol and glucose levels.
6. Itchy skin that is extremely dry
High blood sugar causes the body to lose fluids rapidly, dehydrating the skin, while nerve damage can impair sweat glands that normally keep skin moisturized. Persistent itching or cracking skin should be evaluated, as broken skin creates an entry point for infection.
7. Patches on your skin that are hard and red, brown, or yellow (Necrobiosis Lipoidica)
These patches start as small, firm bumps and gradually expand, developing a shiny yellow center with a reddish border. The skin becomes fragile and prone to ulceration, so see a dermatologist if you notice these changes and treat any breaks in the skin promptly.
8. Thick, hard skin on fingers or toes (Digital Sclerosis)
Long-term high blood sugar can cause collagen to thicken and stiffen, making the skin on the fingers or toes feel tight and waxy. If your fingers feel difficult to bend or the skin appears shiny and stiff, it may be a sign that blood sugar control needs attention.
9. A large blister or a group of blisters (Bullosis Diabeticorum)
These fluid-filled blisters form without any injury and most often appear on the feet, legs, or hands. Do not attempt to drain them at home. See a dermatologist, especially if the blisters are large or show signs of infection such as redness or discharge.
10. Small yellowish-red bumps (Eruptive-xanthomatosis)
These itchy clusters of bumps signal that triglyceride levels may be dangerously elevated, a sign that diabetes is not well controlled. If these appear suddenly, contact your doctor right away. With improved blood sugar management, the bumps typically resolve on their own.
Don’t Let Small Skin Changes Become Serious Complications
Concerned about potential skin issues? At Skin and Cancer Associates, our experienced dermatologists are here to help patients with diabetes. Our advanced treatments can help you prevent skin infections and develop a skincare routine to manage problems related to high blood sugar. Reach out to schedule a consultation today.
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