A vague pain in the right side of the abdomen after the menstrual period has been cleared is considered to be right-sided adnexitis. Among the female internal reproductive organs, fallopian tube and ovary are called adnexa. Adnexitis is a common disease that causes infection of the fallopian tubes and ovaries mainly due to the invasion of pathogenic microorganisms into the reproductive organs. The main factors that may cause adnexitis are menstrual exertion, staying up late, sedentary, standing for a long time, getting cold, blowing wind and other factors. It is also related to improper diet, such as eating cold, spicy, irritating and internal fire favoring foods. In addition, sex during menstruation is very likely to cause pathogenic bacteria to enter the vagina and travel up to the pelvis, leading to the occurrence of adnexitis. These factors above are very likely to cause adnexitis. When this happens, if it is a prolonged hidden pain, you need to consider going to the hospital.