How many months or years to spread a vitiligo in body?

Vitiligo is a chronic skin condition in which pigment-producing cells (melanocytes) are destroyed, resulting in white patches on the skin. The progression of vitiligo can vary widely from person to person, and the time it takes for the patches to spread can range from a few months to several years. Some individuals may experience rapid spreading of the patches, while others may have periods of stability or even repigmentation. Factors such as genetics, immune system activity, and environmental triggers can all influence the progression of vitiligo.