Some people's skin is easy to recover after being stimulated or injured, and it is easy to produce pigmentation.

Scratching the neck at ordinary times, rubbing the inner thigh with meat or Mao Mao or underwear, rubbing armpit hair or meat are all easy to irritate the skin and lead to pigmentation.

Pay attention to whether the wound is easy to leave traces after healing. If so, it may be pigmentation.

Be careful not to use allergic drugs such as iodine, hydrogen peroxide and dermatitis.

Folk prescription 1: Wash your face with warm water and rice vinegar, and gently massage while washing (slightly stronger, it is best to make your face feel slightly hot), twice a day, which can dilute the pigment. Be sure to persist.

It is said that lavender essential oil can also be used.