Vaginitis may be caused by low immune function, inadequate cleansing, and disorders of sex hormone levels after giving birth. 1. Low immune function: due to overwork and reduced exercise after giving birth, the patient’s low immune function may decline, which makes it easier for her to be infected with pathogenic bacteria, and then vaginitis occurs. 2. Inadequate cleansing: Vaginitis may occur due to bacterial, fungal and other pathogenic infections caused by the patient’s failure to clean the inside and outside of the genitals in a timely manner after giving birth to a child. 3. Disorders of sex hormone level: the level of sex hormone in the body of some mothers is significantly higher than usual, which will increase the content of glycogen in the epithelial cells of the vagina, increase the acidity of the vagina, and form an environment favorable to the growth of Candida, resulting in the occurrence of vaginitis. In addition, it is recommended that patients who find vaginitis after giving birth go to the hospital in a timely manner and follow the doctor’s instructions for treatment to avoid delaying the condition.