Hello thanks for your health query on ATD.
As there is no picture but I assume that you are overweight. The darkening of the described areas is known as Acanthosis Nigricans. Usually it disappear if you reduce weight. Sometimes it may be precursor or part of diabetes.
Hope you got it.
These Q&A’s are for educational purposes and should not be relied upon as a substitute for medical advice you may receive from your physician. If you have a medical emergency, please call 911. These answers do not constitute or initiate a patient/doctor relationship.