Skin pigmentation issues arise due to irregular deposition of melanin in the skin.
These factors may be genetic or may be activated by external and more controlable circumstances. Melanin is depostited in the skin by melanocytes. These cells have long arm-like extensions called dendrites that deposit the melanin into melanosomes for transport through the skin. The health of melanocytes is key to almost all pigmentation issues.
Pigmentation concerns can be broken into hypopigmentation (light patches) and hyperpigmentation (dark patches). The patches may be large (e.g. vitiligo) or they may be barely perceptible. There are more than 70 different pigmentation disorders and these can’t all be covered here but there are some common causes.
Here are some of the factors that may be contributing to disturbances in the normal deposition of pigment in your skin
Here are some suggestions on lifestyle changes that should have a balancing effect on your skin