Causes of vaginitis are sexual life hygiene problems, as well as usual female hygiene, female immunity, sanitary napkin quality and tight pants friction. 1. Sexual life: Sexual life often leads to the spread of pathogens, especially men and women who do not pay attention to sexual life, do not pay attention to cleaning before and after the hygiene, or sexual life is too frequent, excessive friction damage to the mucous membrane, resulting in increased chances of infection. 2. The usual hygiene problems: women usually do not change underwear, do not wash the vulva, resulting in vaginitis, the chances will also increase. 3. Low immunity: when women have abnormal immunity, the chances of inflammation will also increase. 4. Sanitary napkin quality or wearing tight pants: all kinds of unhygienic contact or excessive friction damage to the mucous membrane may lead to increased chances of vaginitis. When suffering from vaginitis you should consult a doctor in time to clarify the cause of the disease and treat it actively.