I have already posted a remedy described by Dr. Elchuri to cure melasma here. This is the second remedy to cure black patches on face. Maharshi advices not to use cosmetics, which makes you beautiful temporarily, but harms your skin in long term.
- Buffalo butter
Collect desi buffalo milk, make curd out of it, and extract butter from it.
Massage this butter gently on the patches when going to bed. Leave it overnight and clean it off next day morning while taking bath.
Watch the below video for instructions in Telugu: