HI Nancy - thank goodness no more wrestling - the risk is simply not worth it. Just never forget that concussion is compounding. I have found that the next bump starts off where the other left off. And each time it takes less of a bump to start off again. My GP tells me that those that shoud never bump their head again always appear to - though that is a balance co-ordination thing as well. I know you can't wrap your son in cotton wool, but tell him to be very chosey about what risks he does take with his head! I wanted to put a cool icon on the end of this - I'm not able to attach it!!