It usually comes off in about a week.

Spots are divided into chloasma (commonly known as "sweat spots"), pregnancy spots, dark spots, butterfly spots, etc. Chloasma will also appear on the face of women after childbirth due to frailty and anemia, so pregnancy spots are similar to chloasma. This type of spots is related to blood, liver function and endocrine disorders.

Some people have a large number of dark spots. The reasons can be divided into two types: First, genetic factors. In some women's bodies, the spots appear particularly numerous and obvious because the hormones contain a higher amount of spot matrix pigment than the average person. Second, the influence of ultraviolet light. A person who likes to jump outside or sunbathe will have more spots than other people. Generally, spots are prone to appear in summer.

Most of the pigment problems on the face originate from pigment disorders (the so-called pigment disorders refer to skin diseases caused by melanin metabolism disorders, genetics or trauma), one of which is caused by transition of pigmentation. . Such as: chloasma, freckles, melanosis, pigmented nevus, nevus of Ota, tattoos, etc.