<s>[INST] i am female i have pigmentation on my neck , arms and on back. i am XXXXXXXXX please tell me the medicine name which could be effective, i have visited alot of skin specialist but nothing is changed, i am very ashmed of wearing sleavless please do tell me the fastest treatment of this so that i can get rid of it. thanks [/INST] Hello, welcome to Chat Doctor. I will be glad to be of assistance. I can understand your cancer. But It's important to first understand why are you getting this pigmentation and since how long do you have it. Whether it's an internal condition that needs to be controlled in order to treat the pigmentation or not.  I would recommend that either you send a picture if possible or request your doctor to run a few basic blood tests for you for thyroid etc. meanwhile you can use the glycolic acid 12% cream at night daily on the affected areas. Also using a sunscreen on the exposed parts will be helpful. If there is no internal cause detected, then even TCA peels will be effective which your dermatologist can do for you. Regards. Please let me know your queries. </s>