that leaves a black ring where the jewelry touches/rubs.
And you can go to a dermatologist for a skin test to see if it is a fungus. if it is a fungus it may be possible to spread it to other areas of your body.
Hello,
These rings can be due to acanthosis nigricans. Acanthosis nigricans presents as symmetrical, hyperpigmented, velvety plaques mostly in the folds of skin. It is not itchy and is characterized by hyperpigmentation
. My sincere advice is to consult a dermatologist. The other possibility is of Addison’s disease.
It is very difficult to precisely confirm a diagnosis without examination and investigations and the answer is based on the medical information provided. For exact diagnosis, you are requested to consult your doctor. I sincerely hope that helps. Take care and please do keep me posted on how you are doing.