Thanks for asking question, Melasma (also known as chloasma) is a skin condition in which brown patches occur primarily on the cheekbones, forehead and upper lip. It also may develop on the nose chin, lower cheeks and sides of the neck. The dark patches usually have distinct edges. Melasma is seen most frequently in young women taking birth control pills and also occurs commonly during pregnancy. It may develop in association with menopause, hormonal imbalance and ovarian disorders. Melasma may also be triggered by a medication called Dilantin (phenytoin). In many cases, it occurs without any of these predisposing factors  The tendency to develop melasma is genetically predetermined A factor that does seem to be essential to the development of melasma is sunlight. Both ultraviolet A (UVA) and ultraviolet B (UVB) are believed to contribute. Melasma can be managed by followings 1   hydro quinine creams, kojic acid cream, azelaic acid cream .or 2 chemical peels (glycolic/salicylic) or 3  Nd:YAG laser or Intense Pulsed light system can be used. Consult with some dermatologist for more detail.or let me know. Bye Regards Dr Sher Bhutto