In most cases, girls occasional leg clenching behavior on the body relatively small impact, perhaps muscle cramps, vulvar damage, etc., but long-term, frequent leg clenching, or during menstruation leg clenching may appear mental depression, menstrual disorders, pubic inflammation and other bad effects, and even the potential for sexual frigidity and skeletal changes. 1, leg muscle cramps: leg clenching when the leg force, there may be muscle spasm, usually a transient pain, a short period of time can be relieved; 2, vulva damage: girls clip legs, vulva and underwear repeated friction, may cause vulvar skin and mucous membrane broken, bleeding situation. If this happens, girls need to immediately stop leg clamping behavior, and keep the vulva clean, to avoid wound expansion, infection; 3, depression: girls long-term, frequent leg clamping may lead to reduced sleep quality at night, so that the daytime depression, mainly manifested as difficulty concentrating, mental laxity, easy sleepiness, memory loss, or will affect daily work life; 4, menstrual disorders: if girls in the period leg clamping. May lead to increased menstruation, prolonged periods, in serious cases may lead to menstrual disorders; 5, inflammation of the pubic area: girls clip legs, the pubic area can not form a normal air flow, easy to catalyze the breeding of bacteria, may appear inflammation of the pubic area, such as vulvodynia, vaginitis, mainly manifested as pubic redness, pain, itching, leucorrhoea, increased discharge, etc.; 6, sexual apathy: frequent, long-term leg clamps, repeated pursuit of Sexual stimulation may over-stimulate the clitoris, may also be dependent on self-stimulation, causing sexual insensitivity, and may even lead to sexual apathy; 7, bone changes: If girls are in the growth and development period, long-term, frequent leg clenching has a certain probability of affecting the growth and development of bones, may cause some abnormal changes.