It is very easy to have menstrual disorders during puberty, so don’t worry too much and cause psychological burden. It is a normal physiological phenomenon that most girls will gradually relieve after puberty and gradually become adults. It also has a lot to do with the environment and psychology. If there is excessive tension, environmental changes, increased exercise may appear early menstruation. Girls should be careful not to lose too much weight. Normally only the body maintains about 22% fat to maintain a normal menstrual cycle. If it is lower than this range, it may lead to menstrual disorders. Smoking, drinking, change of diet, irregular work and rest may cause menstrual disorders.