how to cure melasma?

A. Hello ..Castor oil contains rinoleic acid that helps reduce melasma patches. Additionally, this sticky oil is high in vitamin E, which helps heal your skin naturally for a youthful glow. Single-Step Treatment: Apply castor oil on the patches at night Clean your face using a mild face wash. Apply castor oil directly on the melasma patches and leave it on overnight. Wash it off in the morning with cold water. Do this every night and your melasma patches will be visibly reduced after 7 to 10 days. Continue applying it until your skin is restored to its natural shade.