When the patient has the symptom of pain inside the elbow, it may be caused by physiological factors, and may also be caused by elbow joint injury, tendonitis and other diseases. 1. Physiological factors: when the patient exerts too much force on the elbow of the wrist, overwork, and excessive fatigue, the muscles on the inside of the elbow become sore, causing the patient to experience the symptom of pain inside the elbow of the hand. 2. Elbow joint injury: when the patient suffers from elbow joint injury, there will be ligaments around the elbow, joint capsule and other injuries, leading to the symptoms of elbow pain in the hand. 3. Tendonitis: When the patient suffers from tendonitis, it will cause compression and irritation to the nerve of the elbow, which will lead to pain in the elbow. When patients have symptoms of elbow pain, it may also be caused by tendon sheath cysts and other diseases, it is recommended that patients consult a doctor in a timely manner to clarify the cause of the disease, and follow the doctor’s instructions to standardize the treatment.