After a strained hamstring in the arm, the following system of treatment usually provides significant relief in 5-7 days. A strained hamstring is a painful condition caused by damage to the fibers of the hamstring, resulting in inflammatory edema and sterile inflammatory lesions that stimulate the peripheral nerves. In this case, you should: a. Keep the strained tendon at rest and avoid further arm activity, otherwise the injured part will be further strained, leading to further aggravation of the injury. Second, take oral Eperisone Hydrochloride tablets to relieve the tension generated by the injured muscle, after the tension is relieved the muscle becomes relaxed and can help healing. Third, oral non-steroidal anti-inflammatory painkillers, such as nimesulide, ibuprofen, etc., to relieve the local inflammation, inflammatory edema is reduced after the pain can also be significantly improved. Fourth, take oral Chinese medicine to activate blood circulation and eliminate blood stasis, reduce swelling and relieve pain, such as Daqili capsule, blood circulation and pain relief capsule, in order to improve local blood circulation. And be sure to pay attention to keep warm, not to get cold, and use warm water bags for hot compresses to increase blood circulation. Generally, after the above treatment, the symptoms will be significantly relieved in 5-7 days.