What are the characteristics of girls when they have their period?

When a girl reaches a certain age, she has uterine bleeding once a month, which is called menstruation. The first menstruation is called menarche, which mostly occurs at the age of 13 ~ 14. In recent years, the age of menarche tends to advance, and some girls come to menstruation at the age of 9 ~ 10. After menarche, it passes once every certain period, which is called "menstrual cycle". The interval between this menstrual period and the next menstrual period is generally 28 ~ 30 days. But the length of time varies from person to person, and 20 to 40 days is normal. Each bleeding lasts about 4 ~ 5 days.

Because the ovarian function in adolescence is not fully developed, all menstruation after menarche may be irregular for a period of time, and it will be regular after half a year to one year. Menstrual volume is 50 ~ 60ml, ranging from 20ml to 100ml. If you have too much menstruation, you should go to the hospital. It is normal for some girls to have backache, bloating and even stomachache during menstruation, and at the same time have symptoms such as fatigue, lethargy and excitability. However, due to decreased menstrual resistance, endometrial shedding, wounds in the uterus, and acidic secretions in the vagina diluted by menstrual blood, it is easy to cause infection, so pay attention to hygiene during menstruation:

(1) Change the menstrual pad frequently.

(2) Wash the vulva with warm water every day, and don't take a bath in the bathtub to avoid sewage entering the vagina and causing infection.

(3) After defecation, wipe from front to back to avoid bringing bacteria from anus to vulva.

(4) Eat less cold or irritating food, such as pepper and wine.

(5) Drink plenty of boiled water to keep the stool unobstructed.

(6) Ensure adequate sleep.

(7) Don't do strenuous exercise or engage in heavy physical labor, so as not to make the pelvic cavity congested, leading to excessive menstrual blood or prolonged menstruation, which will affect health.

(8) Avoid catching cold, especially don't take a bath, wash your feet with cold water, and sit on the cold ground, because catching cold will shrink blood vessels and cause dysmenorrhea.

(9) Maintain an optimistic and stable mood.