There are many clinical causes of sudden hand pain, most of which are related to trauma, strain or local inflammation, and need to be judged by combining the patient’s specific situation and medical history, and if necessary, consult a doctor for examination to clarify the cause according to the examination results. 1. trauma or strain: the most common cause of sudden hand pain is trauma such as bruises, sprains, contusions, etc. It may also be due to previous history of trauma, or strain caused by too much force or too long. These causes can damage the skin, muscles, ligaments, bones and other parts of the hand, thus causing sudden hand pain, and the pain is more intense; 2. Local inflammation: If due to long-term strain, cold, or trauma is not treated in a timely manner, it may lead to local inflammation, such as tenosynovitis, carpal tunnel syndrome, multiple arthritis of the fingers and palms, etc., which can also cause sudden hand pain, especially during exertion, flexion and extension activities, and The pain will be more obvious when exerting, flexing and stretching activities and getting cold; 3. Other diseases: if suffering from neurogenic cervical spondylosis, one may feel radioactive pain in the hand, arm, shoulder and other positions, which is usually found in the elderly and sedentary people; in a few cases, it is related to tumors in the hand, mostly benign tumors, such as tendon sheath cyst, hemangioma, synovial tumor, etc., and the painful parts may feel small bulging bags, and in very few cases, it is related to malignant tumors. For example, skin cancer. Therefore, patients with sudden onset of hand pain are advised to rest and observe. If the pain does not subside or worsens, patients should go to the orthopedics, hand surgery or pain department of the hospital for medical examination and radiographs to clarify the cause of the pain and then treat the cause.