There are many reasons why a patient’s body may shake for no reason: 1. For example, during a cold or fever, when the body temperature does not rise, the patient will have symptoms of chills, shivering and fear of cold. 2. Patients with epilepsy are also prone to limb tremors, which in severe cases can lead to confusion, foaming at the mouth, clenching of the teeth, tonicity and convulsions of the limbs. 3. If a patient’s side of the body suddenly shakes for no reason, it may also be caused by acute cerebrovascular disease. 4. The patient’s body shaking for no reason may also be the performance of hypoglycemia, the patient will be accompanied by panic, cold sweat symptoms. 5, the patient’s body shaking for no reason, especially the hand shaking obvious, showing dystonia, rubbing mud pill-like changes should be considered Parkinson’s disease.