Prematurely peeling skin from a chem peel will cause discolorations.
If you prematurely peel the skin off from a TCA peel, then it turns red which will then turn brown or blotchy. Another lighter chem peel or bleaching creams helps with the discolorations. If you are still in the red phase then you need a good cortisone cream to prevent the red spots from causing problems.
TCA Burn -- PLEASE SEE BOARD CERTIFIED MD
Do not do this type of peel at home without seeing a board certified physician who is an expert. Best, Dr. Emer.