Undergo fraxel laser resurfacing therapy.. otherwise few creams also available...for detailed prescription do direct online consultation by sending photos.

Yes please send pics n take consultation Sun protection is must to lighten black spots Laser rx might be required for your scars

Pigmentation or darkness of the skin can be because of many causes. Suntan, being overweight that is sedentary lifestyle, some pigmentation disorders like acanthosis nigricans for melasma, nutritional deficiency etc are some conditions. unless I take proper history and examine the affected area, a diagnosis cannot be made. please don't do any home remedies because if they go wrong it can worsen the problem. Please send photos using online consultation for proper examination diagnosis and treatment

Avoid sunexposure.......use a sunscreen while going out

Without examining the images : i cannot help you , take a consultation for the same . Regards