People suddenly convulse all over the body, consider the following reasons: 1. Neurology consider seizures, epilepsy belongs to the more common symptoms. If the patient is myotonic and clonic seizures will manifest as twitching of the limbs. The patient will have impaired consciousness, eyes upward, and may be accompanied by nausea, vomiting, and foaming at the mouth. 2. The patient’s sudden onset of convulsions should also be considered to be caused by cardiac arrhythmia, such as bradycardia, tachycardia, and conduction block resulting in A-Syndrome. The patient will have a transient lack of blood supply to the brain, manifested by sudden palpitations, chest tightness, chest pain, and the patient will soon experience loss of consciousness, fall or fainting, accompanied by upturned eyes and twitching of the limbs. The duration of this symptom is relatively short, and the patient may wake up in a few seconds or minutes. Moreover, the patient may have head and facial fall after the attack of A – S syndrome.