The differential diagnosis of convulsions includes the following: 1. Seizures: Patients will have seizures with twitching of the limbs and face, foaming at the mouth, eyes rolled up, teeth closed, and even biting the tongue as well as urinary and fecal incontinence. Seizures can be recurrent, and EEG and head CT can be done to clarify the diagnosis. 2. Febrile convulsions: Febrile convulsions are easily seen in children, with impaired consciousness and twitching of the limbs when the body temperature exceeds 39°C. EEG, head CT and blood tests can be done to clarify the diagnosis. 3. Tonic convulsions: Patients can be seen in tetanus with tonic spasms, muscle tonicity of the limbs, teeth clenching, and corns recoiling. 4. Restricted twitching: such as hand and foot twitching caused by low calcium, and hyperventilation syndrome due to excessive carbon dioxide discharge, patients can also have hand and foot twitching.