What is the skin disorder where part of your skin is lighter than others?

The skin disorder where parts of the skin become lighter than surrounding areas is called vitiligo. This condition occurs when the melanocytes, the cells responsible for producing skin pigment, are destroyed or malfunction, leading to depigmented patches. Vitiligo can affect any area of the skin and may also impact hair and the inside of the mouth. The exact cause is not fully understood, but it is believed to involve autoimmune factors.