The causes of muscle jumping on the left side of the face may be emotional excitement, facial muscle spasm, multiple tic disorders, etc. 1. Emotional excitement: too much tension, anger and other emotions will stimulate the facial nerve center, triggering muscle jumping. 2. Facial muscle spasm: caused by vascular compression, tumor or inflammation, usually manifested as unilateral facial muscle paroxysmal, rhythmic beating, accompanied by severe twitching of the corners of the mouth, deafness and so on. 3. Multiple Tourette Syndrome: caused by family genetics, stress and other reasons leading to neurological dysfunction, typically manifested as facial eyes, lips and other parts of the muscle jumping, and accompanied by decreased attention, difficult to fall asleep and so on. The left side of the face muscle throbbing can be taken to relax, massage and other ways to improve the symptoms, if the throbbing develops into twitching or affects the flexibility of the five senses, it is recommended to go to the hospital as soon as possible.