How to lose weight without menstruation because losing weight will cause irregular menstruation, which is mainly related to the way of losing weight: 1. Many scented teas used for weight loss have side effects, and excessive drinking will cause irregular menstruation. Improper drinking of scented tea and taking a large number of diet pills will have certain adverse reactions to the body, leading to menstrual disorders. In particular, excessive dieting leads to insufficient intake of body capacity, which is a common cause of irregular menstruation. 2, excessive dieting or lead to irregular menstruation. If irregular menstruation has occurred, it is recommended to stop using various weight loss products, which will lead to endocrine disorders and aggravate irregular menstruation. Be sure to keep a balanced diet, don't overeat, and you can take some methods of diet therapy or TCM conditioning.