Eczema Treatment Care

I had irritant contact dermatitis from a Nair chmical burn on the face and it has caused postinflammatory hypopigmentation “It presents as poorly defined whitening of the skin which is irregular in outline. Often the loss of pigment is partial rather than complete. ” Is there anything I can use or do to help get back the pigment in the skin e.g. creams, treatments at dermatologist, prescription drugs etc… I’m so worried that it might be scarred and no longer able to re pigment I’ve had this for some time first turned out to be a red mark but then loss color in the skin. What are treatments that dermatologists do to fix this and the prices because I don’t have much money and it probably won’t be covered under OHIP.
Thanks to the people that reply, I’m desperate for solutions!