Muscle strains in the back area may occur as a result of direct or indirect external forces. A muscle strain will basically cause localized cut-like or pins-and-needles pain, as well as localized swelling, subcutaneous bruising, and pressure pain. In the case of muscle strain in the back area, you can stop all activities and rest in bed in time to avoid aggravating the degree of injury. In the muscle strain, you can give a cold compress to deal with it, using a dry towel wrapped in ice on the strained part to reduce swelling and relieve pain. Two days after the injury, the local can be changed to hot compresses, hot towels or hot water bags on the strained area to promote blood circulation and promote the absorption of bruises.