Arterial pain on the left side of the neck may be caused by trauma, lymphadenitis, left carotid artery occlusion, etc., and needs to be treated by medication or surgery. 1. Trauma: local muscle strain caused by twisting the head too fast and too quickly, falling pillow or keeping the head down for a long time can cause the symptoms of pain in the left neck artery. Local hot compresses can be applied to relieve the symptoms of pain. Rest more in life, choose the right pillow, improve the bad posture. 2. Lymphadenitis: If lymphadenitis occurs in the left side of the neck, it will lead to pain in the neck, and in serious cases, it may also be accompanied by enlarged lymph nodes, restricted movement and generalized fever. Antibiotics and antipyretic drugs can be prescribed. 3. Left carotid artery occlusion: carotid artery occlusion can cause local tissue ischemia, hypoxia, neck pain symptoms. Severe symptoms may also require surgery to restore blood flow to the artery and relieve pain. Arterial pain on the left side of the neck can also be seen in other diseases, it is recommended that patients go to the hospital to clarify the cause of the disease, under the guidance of the doctor for treatment.