The arm muscle soreness after work is mostly caused by lactic acid accumulation, muscle strain or strain, it is recommended to brake and rest first, appropriate hot and cold compresses, and in serious cases, you can use drugs to relieve. 1. brake rest: after work arm muscle soreness may be muscle strain, strain caused by immediately brake rest, avoid arm again hard. 2. Hot and cold compresses: arm muscle soreness after work may be caused by the accumulation of a large number of lactic acid in the arm, you can first cold compresses, and then hot compresses. 3. medication relief: after work arm muscle soreness symptoms have persisted, you can use ibuprofen and other drugs to relieve. If the symptoms of arm muscle pain after work are more serious, it is recommended to go to the regular hospital in time.