Caused by thigh pimples mainly due to the following reasons: 1, may be caused by mosquito bites caused by pimples, this situation generally do not need treatment, will automatically disappear. 2, may be caused by the thighs of the local skin lymph node enlargement caused by the general recommendation to eat anti-inflammatory drugs can be relieved, while drinking more hot water can be played to alleviate the 3, may be due to the allergy caused by the skin of the thighs have pimples, generally as long as the allergen contact can be avoided. Pathological causes, thrombophlebitis caused by the skin surface of the veins appeared venous sinus or even thrombus, patients with thrombophlebitis, may also be accompanied by pain and swelling of the legs. Most of the patients are middle-aged and old people, and they need to go to the hospital in time for treatment, and if necessary, they also need to undergo surgery to alleviate their condition. For middle-aged and elderly people, they should not stand for a long time or sit for a long time to avoid thrombophlebitis, and at the same time, they can exercise properly to promote the blood circulation of the body, and they should develop a good habit of work and rest.