What causes long spots on both sides of the cheeks?

A variety of diseases can cause long spots on both sides of the cheek, more common are chloasma, freckles, pigmentation after inflammation, etc. The cause of chloasma may be related to sunlight exposure, changes in hormone levels in the body, drugs and other reasons. Freckles are caused by genetic factors, is an autosomal dominant genetic disease. Pigmentation after inflammation is due to skin pigment changes after absorption.