Detailed answer

Melasma, a common skin condition characterized by brown patches on the face, is found to be more prevalent in individuals with a history of autoimmune diseases. Autoimmune diseases are a group of conditions where the immune system mistakenly attacks healthy cells in the body. While the exact relationship between autoimmune diseases and melasma is not yet fully understood, studies have shown a higher incidence of melasma in individuals with conditions like lupus, vitiligo, and Hashimoto's thyroiditis. It is speculated that an overactive immune system in autoimmune diseases may trigger changes in pigment-producing cells in the skin, leading to the development of melasma. However, further research is needed to establish a definitive link between autoimmune diseases and melasma.