Contact your doctor because an infant who is having seizures requires a medical consultation. Seizures can have many different causes, but consulting with your doctor and performing tests will narrow down the specific problem.
Silent, or petit mal, seizures can occur in children. In some cases, a child can be born with a neurological problem, or get it very early in life. The only way to tell for sure if a child is really having seizures, and the appropriate treatment if he is, is to see a doctor or neurologist as soon as possible.
An infant can have a silent or absent seizures. At home make a video recording of what you observed and see a pediatrician or neurologist immediately. Your infant will have a few tests including a video EEG and probably a scan to see the cause and confirm if it is actually seizures. there are several drugs to control the seizure.
Seizures are dangerous, especially in an infant. A baby often won't cry until after the seizure because the could not move during the seizure. Record the time and duration of each seizure, and contact your doctor. If possible, capture it on video so the doctor fully understands what you witnessed.