The clinical side effects of lactic acid suppositories are as follows: first, they may cause local irritation after insertion into the vagina, resulting in discomfort or occasional tingling at the vaginal opening. Most of the symptoms will disappear after continued use. Secondly, very few people may be allergic to the suppositories and experience localized redness and swelling of the vulva and severe itching. Once this symptom occurs, it is recommended to stop the treatment and go to the hospital as soon as possible to give anti-allergy treatment, while other methods can be used to treat the primary disease. Lactic acid suppositories are mainly used to increase the local resistance of the vagina and increase the local lactobacilli, thus reducing the possibility of inflammation caused by the reproduction of pathogenic bacteria.