Although the exact cause of melanosis is not fully understood by science, the following are considered to be the main causes:

Reasons for melanosis
Autoimmune Conditions: The main cause is believed to be when the body’s immune system mistakenly attacks and destroys the cells that produce melanin (melanocytes).

Genetics: If someone in the family has this condition, others are more likely to get it. Some inherited genes may be responsible for this.

 

https://youtu.be/LW_eKxRZZT0

Stress: Severe psychological stress can affect the body’s immune system and cause or worsen melanosis.

Skin injuries: Some people may develop white spots after sunburn, chemical burns, or even after injuries.

Neural causes: Certain types of changes in the nerves are also thought to affect melanin cells.

Main characteristics
Spots form as the skin loses its color.

It usually first appears on parts of the body such as the face, hands, and feet.

 

https://youtu.be/LW_eKxRZZT0

Even the hair in the affected area may turn white.

This is not a disease, but simply a discoloration of the skin.