Anxiety is actually a normal emotional response and can usually affect menstruation. According to Chinese medicine, poor mood can cause psychological disorders, and anxiety often causes Qi stagnation and blood stasis or poor flow of Qi and blood, which can lead to menstrual disorders. For example, many girls who are about to take the college entrance exams may have delayed or irregular menstruation. It is clinically believed that because anxiety can affect the cerebral cortex, and the pituitary gland has control over the secretion of menstruation, excessive anxiety can affect menstruation and lead to irregular periods.