Brain defency ?

the brain reduce the size and give up the space in the brain and i would approaching to know why it couse that and if is dengerous?Brain defency ?
WHAT? Are you talking almost epilepsy? There are all level of severity in requisition disorders. You haven't given enough information to indicate what your specific problem is or what your asking specifically. If we know why seizures develop don't you think we'd enjoy figured something out to transmute that? It can be dangerous if someone have a very severe disorder, and it can be death-defying because of the environment someone is in. Many relations hurt themselves when they have seizure by falling and hitting something or hitting something while having a Grand Mal. And even biting their tongue or choking during the appropriation. I suggest looking it up in a medical magazine to find the specific answers you want, or call your neurologist.
Are you conversation about brain volume decreasing. In medical prose we talk of atrophy.
All kind of damage eg: alcohol, stroke, trauma, degenerative disorders, infections can make happen it.
Sometimes harmless, sometimes go together with life span threatening diseases. You will find a lot if you look into with the words: brain atrophy the network like Google.