Final answer:
Interictal spikes on an EEG should make you think of epilepsy.
Step-by-step explanation:
When an EEG shows interictal spikes, it typically indicates the presence of epilepsy. Epilepsy is a neurological disorder characterized by recurrent seizures, which are caused by abnormal electrical activity in the brain. There are different types of epilepsy, and the cause can vary from genetic factors to brain injuries or diseases. Treatment options include medication to control seizures and, in severe cases, brain surgery.