First, mycosis may be caused by Candida infection. Candida is a common bacteria in the vagina and if there are changes in the vaginal environment, Candida infection can occur, such as increased glycogen or increased acidity in the vagina, which can lead to rapid reproduction of bacteria and inflammatory reactions. Secondly, mycosis can also be triggered by medications, such as the regular use of birth control pills or antibiotics and hormonal drugs, which can also cause the disease. Thirdly, a lowered immune system can also cause mycosis vaginalis, and if you are in low health, you may also have problems with infection when you come in contact. Fourthly, sexual or indirect contact may also lead to this disease, so it is important to pay attention to personal hygiene and avoid contact infection.