Whether 4 febrile convulsions in a 2 year old baby will affect the brain needs to be determined by the duration and extent of the convulsions, which may develop into epilepsy if they last for a longer period of time and are more severe. Febrile convulsions usually occur between the age of six months and three years, and may lead to abnormal discharges in the baby’s brain tissue, loss of consciousness, convulsions, foaming at the mouth and other adverse reactions. 1. If there are four convulsions of high fever, but each time is shorter than five minutes, and there are no other symptoms, and timely delivery to the hospital for treatment, then the impact on the brain is not significant. 2. If the duration of febrile convulsions is longer than 5 minutes, and the accompanying symptoms are more serious, and not sent to the hospital in time, it may develop into epilepsy, which also has a certain adverse effect on the brain. So the baby in the appearance of high fever, parents need to give timely treatment of antipyretic drugs, and at the same time actively to the hospital for blood routine examination, clear cause and symptomatic treatment.