There are many causes of convulsions in two-year-old babies usually consider the following: First, it is more common to have febrile convulsions, and some babies are highly sensitive and prone to convulsive convulsions when they have a high fever. Second, epilepsy is also relatively common, a variety of different causes of secondary epilepsy and primary epilepsy can appear repeated convulsions. Thirdly, attention should be paid to electrolyte disorders, especially seen in the case of vomiting and diarrhea which can easily cause convulsions due to calcium and magnesium deficiency. Fourth, we should pay attention to rickets babies can also cause convulsions. Fifth, if there is hypoglycemia or cardiovascular and cerebrovascular malformations, hypoxia can cause repeated convulsions.