my dad

Hi i am 29 years old and my dad has ms. When i was little he was fine and then when i was about 9 he couldn't walk for about 2 year then one morring he had to go to the bathroom and he got up and walk. He has been doing good ever sinces he still has bad day when you can't get out of bed but he is a fighter. He never really tell me much about having ms a few weeks a go my step-mom said that the va wants to drill a hole in his head and she dosen't know why. I do know that some dr think it is ms and other say it can't be beacause he has gone from bad to good and most people who can't walk from ms never walk again. I don't what to think and i don't know why they would want to drill a hole in his head is there something he hinding from us. I was test for ms and they wanted to drill a hole in my head. how can i find out what really going on ...