Doing push-ups arm soreness may be physiological factors, chronic strain, muscle acute injury and so on. 1. Physiological factors: when doing push-ups, due to the frequent contraction of the muscles in the arm area, a large amount of lactic acid may be produced, causing stimulation of the surrounding tissues, which will lead to arm pain, and can usually be recovered after reasonable rest. 2. Chronic strain injury: arm long-term cold or often strenuous exercise, may lead to local soft tissue aseptic inflammation, in the push-up exercise, there will be symptoms of arm soreness, cold or pressure, the symptoms of soreness is obvious. 3. Acute muscle injury: no warm-up activities before the push-ups, too fast, and a large amount of exercise, may lead to local muscle mild tear injury, it will cause arm pain. Do push-ups arm soreness, the symptoms are more obvious, it is recommended to timely medical examination and treatment.