Why can Treating Problems in the Brain be Hard?

The Brain can go wrong, in Many Ways -Very Hard to repair the Nervous System. Neurones in the CNS don't Repair Fast, and no manmade way is made to Repair Neurones -If a Problem happens in a Hard Accessible Part, Treating could be more Difficult. -Treating can lead to Permanent Damage. [Surgery of Brain Tumor could lead to Parts of Brain being Damaged]