The common causes of overworked hand pain include muscle strain, tenosynovitis, and fasciitis. 1. Muscle strain: after overexertion and injury to the muscles of the hand, a large amount of lactic acid is produced in the muscles, and the accumulation of local lactic acid produces pain in the hand from overexertion. 2. Tenosynovitis: under the stimulation of factors such as prolonged exertion of the hands and catching cold, it causes aseptic inflammation of the tendons and tendon sheaths, resulting in pain in the hands. 3. Fasciitis: due to hand exertion or long-term weight-bearing and other factors, pulling and stimulating local lesions, appearing hand pain after exertion. Caused by excessive pain after hand exertion, there may be other reasons, it is recommended to timely hospital consultation, improve the examination to clarify the cause of the disease, under the guidance of the doctor for standardized treatment.