You have probably come across people with what appears to look like burnt skin and you wonder how they got here. Perhaps, too, you have judged them for using cheap products.
Well, no, these people, especially middle aged women and men, did not necessarily use cheap products. They used products containing hydroquinone for a long period of time and their skin just gave in.
Hydroquinone is a toxic substance that has been banned in most countries but is still allowed in the US. It is not particularly friendly to black skin, not even if the product claims it has just 2 % . Steer clear completely.
The damage it leaves is usually permanent but it can be considerably healed by applying green tea masks and using sunscreen as well as taking supplements of Vitamin C and Vitamin E but it's still a long shot. It would eventually clear off, though.
Go for healthier alternatives to hydroquinone. Try using creams with kojic acid, alpha Arbutin and resveratrol.