Dark Skin

If your body makes too much melanin, your skin gets darker. Pregnancy, Addison's disease, and sun exposure all can make your skin darker. If your body makes too little melanin, your skin gets lighter. Vitiligo is a condition that causes patches of light skin. Hyperpigmentation is a medical term used to describe darker patches of skin. These patches result from excess melanin production, which can be caused by everything from acne scars and sun damage to hormone fluctuations.
Hyperpigmentation is a common skin condition, and there are a number of different treatment options available. Face acids, or skin acids, work by exfoliating, or shedding, the top layer of your skin. Whenever you exfoliate your skin, new skin cells emerge to take the place of the old ones. The process helps even out your skin tone and makes it smoother overall.
Chemical peel A chemical peel uses acids at stronger concentrations to treat the desired area of skin. It reduce the appearance of hyperpigmentation by removing the epidermis. Deeper versions may also penetrate the middle layer of your skin (dermis) to produce more dramatic results.

Laser peel (skin resurfacing)
A laser peel (resurfacing) treatment uses targeted beams of light to reduce hyperpigmentation. There are two types of lasers: ablative and non-ablative. Ablative lasers are the most intense, and they involve removing layers of your skin. Non-ablative procedures, on the other hand, target the dermis to promote collagen growth and tightening effects.
Microdermabrasion
Microdermabrasion is an in-office procedure used to treat hyperpigmentation that affects the epidermis only (superficial scarring).
Dermabrasion
Dermabrasion also involves the removal of your epidermis, but its effects continue down to part of your dermis.
While dermabrasion is sometimes used to smooth out wrinkles, the procedure has been historically used to address texture concerns. These include:
acne scars
age spots
chickenpox scars
injury scars
sun damage