The mites in the lower body are commonly known as scabies mites, and there are many reasons for the development of the disease, such as not paying attention to personal hygiene, direct transmission, indirect transmission and so on. 1. Not pay attention to personal hygiene: usually do not do a good job of personal hygiene, do not wash, disinfect sheets, quilts, mattresses and other supplies in a timely manner, it may lead to scabies mites in the lower body to reproduce, growth, resulting in the phenomenon of mites in the lower body. 2. Direct transmission: patients can spread through direct contact, such as direct physical contact with patients suffering from scabies mites, sexual intercourse, etc., which may lead to mites in the lower body. 3. Indirect transmission: sharing bath towels, bed sheets, quilts and other items with a patient who has scabies mites may cause indirect contact transmission, leading to scabies mites in the lower body. There are many reasons that lead to scabies mites on the lower body, it is recommended that patients go to the hospital in time to improve the examination, follow the doctor’s instructions to give standardized treatment, do not ignore the symptoms and take it lightly.