Melasma

Melasma is most common in women 20-50 years of age.
Melasma looks like brown, tan, or blue-gray spots on the face (hyperpigmentation).
Melasma is characterized by three location patterns (central face, cheekbone, and jawline).
Melasma is caused partly by sun, genetic predisposition, and hormonal changes.
The most common treatment is topical creams containing hydroquinone.
Melasma prevention requires sun avoidance and sun protection with hats and sunscreen.