There are several possible causes of right lateral thigh muscle soreness: 1, muscle strain, if the amount of exercise or labor is too much, may lead to right thigh muscle strain, a large accumulation of lactic acid so that the right thigh muscle soreness discomfort. The right thigh muscles may be aseptic and inflammatory if the thigh is strained for a long time or over-weighted, thus making the muscles sore and painful. The treatment can be to compound wind chasing cream topical relief of soreness, Futalin oral pain relief, herbal compresses, herbal fumigation, herbal foot soak and other physical therapy to relieve symptoms. 3, rheumatic diseases, if the right thigh muscle soreness at the same time there is morning stiffness, joint activity pain and other symptoms. May be rheumatic diseases, such as rheumatoid arthritis, etc., need to see the hospital to clarify the cause of symptomatic treatment.