Hi You seem to be having a very common pigmentation problem named Melasma. First of all, you should use a sunscreen regularly before going not in the sun. Apply it atleast half an hour before sun exposure. You might need to apply a lightening agent over the affected areas. Something like kojic acid and vitamin c combination helps in most cases. Eat a diet rich in citrus fruits containing vitamin c. Take plenty of fresh fruits and salads. See a dermatologist if the pigmentation tends to persist for long. There are many procedures which can be done to improve the scars. Hope it helps Dr GeetikaPaul