Hypopigmentation is common and approximately one in twenty have at least one hypopigmented macule. Hypopigmentation can be upsetting to some, especially those with darker skin whose hypopigmentation marks are seen more visibly. Most causes of hypopigmentation are not serious and can be easily treated. 
Hypopigmentation refers to patches of skin that are lighter than your overall skin tone. Your skin’s pigmentation, or color, is based on the production of a substance called melanin.