The causes of pain symptoms in the front of the left shoulder are as follows: 1. Most of them are due to overexertion or strenuous exercise, resulting in chronic strain on the local soft tissues in front of the shoulder. 2. The pain symptoms may be caused by tenosynovitis of the long head of the biceps tendon. 3. Therefore, if you have pain in the front of the left shoulder, first of all, you should avoid strenuous activities in the left upper limb, pay attention to rest, and cooperate with acupuncture, local hot compresses on the left shoulder, and appropriate massage for comprehensive conditioning to relieve the pain and promote the recovery of the condition. If, after the above standardized and strict symptomatic treatment, the symptoms of pain in front of the left shoulder are not relieved, you must go to a regular hospital in time to improve the MRI examination of the left shoulder joint and choose further treatment after the cause is clear, so that the symptoms of pain in front of the left shoulder can be improved in time and effectively.