The redness, swelling and pain in the inner thighs are generally the following common clinical causes: a. Varicose veins with infection, varicose veins can be in the inner thighs with the convoluted expansion of superficial blood vessels, combined with acute inflammation will appear obvious redness, swelling and pain. At this time, it is recommended to apply local topical Ruyi Jinhuang cream and take oral amoxicillin and levofloxacin tablets to strengthen anti-infection treatment. After the inflammation of the inner thigh is completely absorbed, it is recommended to perform surgery to remove the varicose veins, which can avoid the recurrence of local redness, swelling and pain. Second, the lower extremities, hemolytic streptococcus can spread to the inner thigh along the superficial lymphatic vessels, causing local redness, swelling, pain, can be treated by local topical 50% magnesium sulfate, intravenous infusion of cephalosporin antibiotics anti-infective treatment, 1-2 weeks after the inner thigh redness, swelling, pain symptoms can be gradually relieved.