If my baby has a seizure does that mean he has epilepsy?

No. A solitary seizure episode does not necessarily mean that your baby has epilepsy. Epilepsy is typically characterized by multiple episodes of seizures with correlating findings on an eeg. For example, children who have febrile seizures (typically between 6 months and 6 years of age) do not usually receive the diagnosis of epilepsy. A pediatric neurologist is the one who will make the diagnosis.
No. Childhood is marked by a brain that can have simple seizure activity, like febrile seizures, or other events like rholandic seizures, that will disappear as the brain matures. This may be by 6 or 16 but most childhood events do not result in epilepsy. Your pediatrician or consultants will help you sort that out over time.
No. From 6 months to 6 years febrile seizures --non-permanent convulsions triggered by fever--are far more common. It is generally accepted that febrile seizures cause no longterm injury. Epilepsy is often associated with aberrations in the brain anatomy or nerve conduction ("electrical wiring" of the brain.).Medication is rarely needed for febrile seizures; however epilepsy requires long term meds.
No. Epilepsy is a brain disorder involving repeated, spontaneous seizures of any type one seizure is not diagnostic but needs to be evaluated.

Related Questions

Why shouldn't people restrain an infant or child with epilepsy during a seizure?

You can break bones. The shaking an infant or child does will not hurt them. However, well, meaning people that have restrained a kid during a seizure have actually broken arms or other bones when the violent spasms occurred against their pressure to stop them. Read more...
Adults overwhelm kid. People having an epileptic seizure may move their bodies with unrestrained force. If an adult restrains the child, the difference in power of the adult may have a lever effect that might cause a fracture of an upper or lower extremity. Just move the seizing person away from the corners of furniture, place them on the floor so they will not fall if you leave to call 911. Protect the head. Read more...