If there is a sudden throbbing in a part of the body, it may be caused by a sudden blood vessel erection, which is due to a lack of blood vessel circulation. It may also be a muscle jump, or in more severe cases, it may be a muscle spasm, or it may be a neurological jump. The factors that cause muscle spasms may also be related to increased neuromuscular excitability due to calcium deficiency, or may be caused by strenuous exercise or muscle fatigue in normal life. You should go to the regular hospital to do electromyography, blood calcium clear and other tests to make a clear diagnosis, you can find the cause of this symptom. If it is caused by calcium deficiency, it is recommended to treat it by calcium supplementation under the guidance of a doctor. The sun is usually shining, the daily outdoor activities are increased, and more milk, fish soup and other nutrient-rich substances are consumed appropriately. If it is not very serious you can do massage, if you do not get better you should go to the hospital for treatment.