I Have A Nephew That Is 22 Years Old And

I have a nephew that is 22 years old and he began having seizures at the age of 19... The doctors he has seen so far can find nothing wrong with his brain and he has the seizures that he blank out for about 20-30 seconds then he can't remember if he had one or not also has to recuperate so he can get back to what he was doing before. What I would like to know is. Is there any new information about these types of seizures and will surgery do any good