A normal menstrual cycle is usually around 21 to 35 days, with an average of 28 days. However, the length of the cycle varies from person to person, just like everyone’s relatives cannot all look the same, the personality and hobbies of your great aunt are also customized for you. Usually, a 7-day advance or delay on top of a 28-day period can be considered normal and nothing to worry about. However, if you have not come for more than 7 days, you need to keep track of your menstrual cycle a few more times and feel your aunt’s temperament. You can’t just look at the situation once, but if your menstrual cycle is abnormal for a long time, it may be caused by these reasons. The first is due to bad moods. Prolonged low, negative emotions or exposure to high-pressure environments. Second, bad lifestyle habits. Such as prolonged late night, smoking and drinking, dieting and weight loss or overeating, etc. Third, the impact of contraceptive means. Recently taken emergency contraceptive pills or subcutaneous implants and other means of contraception. Fourth, disease factors. Suffering from endocrine diseases such as polycystic ovary syndrome, hyperthyroidism, hypothyroidism, diabetes, or organic diseases such as endometrial polyps, uterine fibroids, endometrial cancer. If the abnormal menstrual cycle is caused by emotions and habits, remember that “shopping exercise and sleep are the best way to relieve emotions; quit bad habits early, and you can get a healthy cycle! With this mantra, normalcy is a matter of time! If it is caused by contraceptive measures, it is usually normal after stopping the pill for a period of time. But if it is the last case, you need a doctor to help, do not hesitate, must quickly go to the doctor Oh! I hope all women can find out the preferences of their aunt, understand her cycle and live in harmony with her!