Greetings.
1. Avoid using cosmetics, facial, spa, scrubs
2. Diet rich in
vitamin c and vitamin A will b helpful like lemon, amla, almonds, green vegetables etc.
3. Strict sunprotection . Use good sunscreen regularly .
4. Drink atleast 2-3 litre of water daily .
Kindly share your photographs, so that we can help you out better. Diagnosis and finding reason behind your pigmentation is very important for appropriate treatment .