What's wrong with my sister? What's a petty mal seizure?

Small bad/Big bad. Petit mal (small bad) as opposed to grand mal (big bad) are early simple descriptions of the intensity of disruption a seizure may have with the victim. In the petit mal patient the brain wave disruption is often brief, having the effect of one zoning out for a moment & coming back without knowledge of the event. It is a brain wave disturbance that is controllable with meds.
Petit Mal Seizure. It is characterized by abscence of seizures. Child suddenly loss consciousness lasting few seconds, fluttering eyelids and resume activities not knowing that he had a seizure.It can occur several times a day.