Hey dont worry its common with most women post pregnancy. the best way is to start eating healthy and keeping yourself hydrated all day long, besides that a a few skin care routines like using turmeric and rose water pack, moisturizing the skin with almond oil ,. you can also use clay mask

Hey Aarti. It's ok of have pigmentation. It will help lighter if you follow these these steps. Using a face pack which consists of papaya helps in reducing pigmentation. Take 1 tbsp honey, 2 tbsp papaya, and 1 tbsp aloe vera pulp and mix to make a pack. Apply it on affected areas and wash it off after 30 minutes. This mask will not only treat pigmentation but also helps in breaking down dead cells. I hope this helps