Delayed menstruation in women is related to inflammation, and the severity and type of inflammation can affect menstruation in different ways. If a woman suffers from chronic endometritis, the long term stimulation of the inflammation may lead to the process of exfoliation, regeneration and repair of the endometrium. The contraction of the uterine blood vessels can lead to irregularities in the menstrual cycle, resulting in delayed menstruation. Delayed menstruation is related to the endocrine condition of the body. If the psychological state is under prolonged stress, mental tension, prolonged late night without rest, diet and environmental changes, it will easily lead to endocrine imbalance. It is recommended that women with long term menstrual delay go to the hospital for examination to clarify the cause and treatment.