My friend hasn't been there for a long time!

This is normal, please don't worry too much.

In adolescence, the neuroendocrine regulation function of hypothalamus-pituitary-ovary axis is not fully mature, which leads to irregular menstruation. Although the follicles in the ovary are mature, they do not ovulate. Until the ovarian development is completed and the function is sound, the egg can mature for one month, and it will be discharged as soon as it matures, and menstruation will come on time on a monthly basis. There are individual differences in the periodic response of endometrium to sex hormones, and the physiological and psychological state of adolescence will affect the release of sex hormones and change the normal menstrual cycle rhythm. Great changes in the life and work of adolescent women can also lead to irregular menstruation. Generally speaking, environmental changes, excessive exercise, mood swings or life changes such as exams, relocation and nutrition will all affect the length of menstrual cycle and menstrual flow.

In daily life, if people's mood fluctuates, such as excessive sadness, fear, or sudden changes in the environment, it may lead to menstrual disorders or uterine bleeding. This is because menstruation is closely related to the nervous system and endocrine system of women. Simply put, nerves and endocrine regulate the function of ovary, which determines the changes of endometrium and causes menstrual cramps. Changes in any of these links will affect ovarian function and cause menstrual disorder.

Environmental changes not only directly affect the nervous system, but also affect people's mood and mental state. Emotional fluctuation first affects the function of nerve cells, and then affects the function of endocrine system. The ovarian function regulated by endocrine system changes one after another, which initially affects ovulation and causes menstrual disorder. In severe cases, it may cause the pituitary gland and ovary to stop secreting hormones and cause amenorrhea. Therefore, in life, you should be cheerful, open-minded, not hard-headed, and live in harmony with colleagues, which is very beneficial to maintain normal menstruation. Once the environment changes, we should subjectively establish the confidence to adapt as soon as possible. Once you get used to the new environment and keep a good mood, menstruation will soon return to its original state.