There are two kinds of redness on legs: physiological and pathological. If the redness is caused by standing for a long time, skin sensitivity and other physiological conditions, it can be left untreated; pathological conditions are mostly seen in varicose veins of the lower limbs or allergic purpura. 1. Physiological conditions: long-term standing people, such as teachers, store attendants, etc., due to long hours of standing, resulting in poor circulation in the lower limbs, may appear on the legs of the symptoms of red blood. In addition, the long-term frequent use of exfoliating cream to scrub the skin on the legs can lead to the skin on the legs of the keratin damage and thinning, so that the skin is too sensitive, resulting in redness on the legs. After stopping the use of exfoliating cream, the symptoms will gradually improve. 2. Varicose veins of the lower limbs: early varicose veins of the lower limbs will be manifested as a slight expansion of small veins, resulting in the appearance of redness on the legs, at this time should be actively intervened in, can wear compression stockings to improve the symptoms. If you don’t intervene in time, the large veins will also become varicose and cause veins to appear. 3. Anaphylactic purpura: early symptoms are not serious when there is blood on the legs, at this time should actively intervene to find allergens and avoid them, if necessary, under the guidance of the doctor in the face to face to take antihistamines, such as cetirizine and so on. When patients find blood on the legs, they should go to the hospital in time and follow the doctor’s instructions to standardize the treatment, do not do it on your own, so as not to aggravate the condition.