or pigmentation usually happens because of harmones, such as during pregnancy
, or because of oral contraceptive pills
or because of thyroid
...the greatest enemy for melasma is ultra violet rays...so u have to protect urself from uv rays coming from sun and at the same time from the uv rays coming from laptops, computer, tubelights,etc...so u need to put a good sunscreen atleast 3 to 4 times a day whether u r indoor or outdoor...chemical peeling is a very good option specially tca peels but u ll have to maintain the results doing basic skin care
...uv protection is mandatory life long...have plenty of vit c and vit e rich fruits, plenty of water...