Sore little arms after drinking may be caused by muscle strain, gout, lactic acid buildup and other reasons. 1. Muscle strain: caused by improper exercise posture and excessive stretching. As a result of localized injuries, muscle pain, swelling, and restricted movement can occur, and then soreness in the arms after drinking. 2. Gout: the cause and pathogenesis of gout is still unclear, considered related to gout and hyperuricemia, which can lead to joint redness, pain, swelling, and elevated skin temperature, which can lead to sore arms after drinking. 3. Lactic acid accumulation: After drinking a lot of alcohol, the alcohol component interferes with the metabolism, which can cause a large amount of lactic acid to accumulate, thus triggering the phenomenon of small arm pain. If the symptoms continue to be unrelieved, you should go to the hospital in time and follow the doctor’s instructions for treatment to avoid delaying your condition.