Early symptoms of epilepsy in 4-month-old babies mostly manifest as focal seizures or generalized tonic-clonic seizures. 1. Focal seizures: clinical manifestations start to be confined to one side of the body. It can be characterized by convulsions in one part of the body and can be accompanied by clenching of the teeth and squeezing of the eyes. 2. Generalized tonic-clonic seizure: sudden loss of consciousness and tonic contraction of the muscles of the whole body during the seizure; there can be bruising and even respiratory arrest, etc. Some babies may show shaking of the limbs. Some babies may show shaking of the limbs, often in the form of rowing, accompanied by staring, foaming, sweating, etc., which may gradually stop after a period of time. Epilepsy is a common neurological disease in children, if relevant symptoms appear, you should go to the hospital in time to improve the video electroencephalogram to clarify the diagnosis, under the guidance of the doctor for treatment, standardize the use of medication can be clinically controlled in most patients.