Ear mites in cats do not cause seizures, but if the owner does not treat the cat in time, it may lead to encephalitis caused by pathogenic microorganisms, which can cause symptoms such as seizures and lethargy in cats.
There are several main reasons why cats may have seizures. 
First, seizures can be caused by neurological symptoms resulting from epilepsy. In such cases, it is necessary to administer oral medication for epilepsy and nerve stabilizers to the cat promptly.
Second, intermittent seizures in cats can be caused by calcium deficiency.
Third, convulsions can be caused by congenital or acquired brain injuries, such as encephalitis, hydrocephalus, brain tumors, meningitis, and skull injuries.
Fourth, secondary convulsions caused by poisoning, such as food poisoning, drug poisoning, carbon monoxide poisoning, etc.
