Check out the following web article on skin conditions in diabetics:
The doctor who wrote the article discusses a number of skin conditions found typically in both type 1 and type 2 diabetics. I believe the one you are interested in is called Acanthosis Nigricans. The writer discusses it and gives suggestions about treatments. I do not know if the treatments require a physician's prescription or if they are over-the-counter, but you could discuss with your own doctor.
im 13 years of age and i have discoloration around my neck really bad i have had teachers to evn tell me that i need to go to the bathrom and wash my neck or to wash better i dont like this and it is weird but could i have diabetes
ive had discoloration under my break on my chest and even neck since ive been about 9 yrs old. i went to different doctors and all they tell me is i could have diabetes but when i got blood taken everything was normal. im tored of having this i dont even feel comfortable wearing clothes that dont cover up my chest. and theres nothing i can do in the summer because wearing a turtle neck would look silly. i really need help.