What causes blemishes at the corners of the eyes at age 30?

The type of spots in the corners of the eyes at the age of 30 may be freckles, chloasma or, in a few patients, age spots.
Freckles are genetically related, often occurring after puberty, and can be triggered or aggravated by UV exposure.
Melasma has a complex etiology and is associated with genetics, endocrine disorders, sun exposure, cosmetics, oral contraceptives, phototoxic drugs or anti-epileptic drugs.
The exact cause of age spots is still unclear and mostly occurs in older people, but individually it can start to occur gradually at the age of 30.