Soreness in the muscles of the hand and bladder may be caused by physiological factors such as frequent arm activities and maintaining a posture for a long time, or it may be caused by tennis elbow, myofasciitis, as well as trauma. 1. Physiological factors: if the arm activity time is too long, may lead to muscle lactic acid accumulation, the patient will appear hand bladder muscle soreness. In addition, the arm for a long time to maintain a position, will also appear the situation to appear the situation. 2. Tennis elbow: Tennis elbow is considered to be caused by repeated, long-term contraction or tension of the forearm muscles. Patients will have pain on the outer side of the elbow, restricted movement, and weakened grip strength. 3. Myofasciitis: The etiology of myofasciitis is not clear, and it is considered to be caused by myofascial strain. Patients may show muscle soreness and pain, muscle tension, and thus the situation. 4. Other: patients with arm trauma, osteoarthritis can also lead to hand bladder muscle soreness. If the hand bladder muscle pain is caused by physiological factors, it usually improves after resting and changing postures, and does not require treatment. If the symptoms continue to be unrelieved, it is necessary to consult a doctor in time and follow the doctor’s advice to choose the appropriate measures for treatment.