White spots on the buttocks may be vitiligo, florid chaff rash, post-inflammatory hypopigmented spots and other diseases. 1. Vitiligo: the cause of the disease is not clear, may be related to genetic, autoimmune diseases and other factors, mental factors, skin injury and other reasons can induce the disease. The patient’s local skin will appear white spots, can be seen in any part of the body, can appear alone or widely distributed. 2. maculopapular furuncle: the cause of the disease is mainly related to Malassezia infection. The patient’s local manifestation is a pore-centered dotted rash, which gradually increases with the development of time, and is light brown, white, light red, etc. It can be seen on the chest and back, perineum, buttocks and other parts of the body. 3. Post-inflammatory hypopigmented spots: some inflammatory skin diseases such as eczema dermatitis may appear hypopigmented spots after the rash subsides, which may also be manifested as long white spots on buttocks. There are many diseases that cause white spots on buttocks, so it is recommended to go to regular hospitals for examination and clear causes.