If you are hyperpigmenting after a peel, you should be placed on a product like triluma to control hyperpigmentation. If you just had a light peel and the dark skin has not peeled yet, this is temporary and you might be better off keeping the skin moist with a little bit of petrolatum like Vaseline. Often make up does not hold well on skin that is very dry or hydrated with the vaseline. If you are dealing with post inflammatory hyperpigmentation, then camouflage make up such as Estee Lauder Double-Wear Maximum cover can be used to help hide the patches. Best advise is to communicate with your doctor regarding your chemical peel to learn if your are on track. Not treated by a doctor? You get what you pay for.