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This is probably not just dirt that can be removed with soap or vigorous scrubbing, but possibly acanthosis nigricans, an early symptom of diabetes.

Twitter user and doctor @fiezanizmohamed recently shared this information with the public.

„Look out for dark spots like these on the necks of your children, siblings, or friends. "This is not a collection of dead skin cells, but acanthosis nigricans, one of the early signs of diabetes!“," tweeted Dr. Hafizah.

She further explained that these stains cannot simply be scrubbed away and that it is important to monitor blood sugar levels. Medical literature and sources

Symptom Check App: What is Acanthosis nigricans?

Acanthosis nigricans is a skin disease characterized by dark, thick, velvety discoloration in skin folds and lines, for example on the neck, in the armpits and in the groin. These skin changes usually occur in overweight people or people with diabetes.

Children with this skin condition, especially if they are overweight, have an increased risk of developing type 2 diabetes (nutritional, non-hereditary diabetes).

Further»»

Dr. HafizahMH, also a member of #medtweetMY, a group of doctors who share helpful health and medical advice on Twitter, explained the details of acanthosis nigricans to users who responded to her thread. The dark spots associated with this condition are usually velvety and have a hairy texture. They do not disappear even after thorough scrubbing. Therefore, scars may remain. Besides the neck, symptoms can also occur in the armpits. Furthermore, Acanthosis nigricans should not itch. If it itches and leaves bruises on the skin, it could be eczema and not the described condition. A curious Twitter user asked: „How can we measure our own blood sugar levels? Do we also have to go to the clinic for that?“ Some users responded that you can buy a blood glucose meter at the pharmacy or simply go to a pharmacy and have a blood glucose test done there, which charges a fee. Health = A dark throat, many possible causes. Another concerned internet user added that the photo shared by Dr. Hafizah could also be caused by another condition called „Terra Firma-Forme Dermatosis“ (TFFD).

This is a benign skin condition characterized by brown to black, dirty patches of skin. If the diagnosis of TFFD is confirmed, gentle dabbing with 70% isopropyl alcohol can resolve the problem.

She also added a scientific article on TFFD to provide further information to interested internet users.

Therefore, you should pay close attention to skin changes in your children and yourself, especially if they occur suddenly.

For further information and confirmation, please contact your family doctor.

An examination provides you with more detailed information about diagnosis, causes, symptoms and treatment.