Thirteen-year-old girl with a lot of sweaty hands and feet and no menstruation may be a normal phenomenon. For 13-year-old girls, at this time is in the beginning of puberty, girls in the role of androgens will first appear breast development, axillary hair, pubic hair, sweat hair increase thick and other manifestations, menstruation is marked by the girl’s sexual function development and maturity, so generally in the emergence of the other secondary sexual characteristics of the 1 to 2 years after the menstruation to come. If the girl is still not menstruating at the age of 16 or so, it is necessary to be alert to the occurrence of primary amenorrhea and other pathological conditions, parents are advised to take their children to the gynecology department of regular hospitals as early as possible, improve the sex hormones and other related examinations, and then take active treatment under the guidance of the doctor to clarify the cause of the disease.