The bruises on the legs of women are generally two kinds of cases: 1, physiological situation: physiological situation, lesbians because the skin blood vessels are more fragile, after bumping, will appear bruises, blood vessels are more brittle, more brittle this is a physiological cause, this situation should pay attention to the prevention of bumping, do not need treatment, and do not need to check; 2, pathological reasons: the so-called pathological because the patient appears on the blood or vascular problems. Blood problems, long-term use of aspirin, some anticoagulant drugs can cause changes in blood or platelet reduction; or allergies caused by changes in vascular function, vascular changes caused by a touch of bruising, the corresponding laboratory tests, such as routine blood tests, coagulation function, allergens, according to different laboratory results, the choice of different drugs to treat, such as commonly used drugs are vitamin C, rutin tablets, calcium tablets, including some anti-allergy drugs, can be used to prevent bruising. Including some anti-allergy drugs, can improve the blood vessels, especially to improve the small blood vessels.