Holly my DS is the same with his pants, opposite with his shirt. I know it looks funny but it makes them feel better and better able to cope with more important things IYKWIM. We have found that by getting him really tight socks and shoes the pants aren't such a big problem anymore, so maybe look into a compression or weighted vest for him.
Hair issues - you can desensitive them by using sensory tools but we haven't done any of this yet, maybe Christy

