I have a dark neck, its only the lower side of neck that i have done
thyroid and other tests but nothing came out of it .finally the doctor said it could be because of genetic factors.however when i tried peel off treatment the darkening got lessened but it came back again.I am currently trying bleach ,the issue is same again ,it lightens a bit but then in around 10 days the situation is same.Please suggest if bleaching can be done in less than 15 days for darker areas and any other good creams.