H.D.
He could be having some muscle spasms. When my 6 month old was in a body cast, they had me use the blow dryer under a towel that was on top of her cast to help calm the muscles down, it definitely helped. As far as how I bathed my little one, all I could do was sponge bathe her on the floor in the kitchen. I got a stack of towels (about 2 folded) for under her head to catch all the water and laid her on top of 3 towels (yes, this process used a lot of towels!) for comort on the tile floor. I then had a bowl of warm soapy water (I used Johnsons & Johnsons baby wash) and another bowl with warm, clean water for rinsing. I washed her head with the washcloth and all her body parts that were accessible and then I took a clean wash cloth and soaked it in the rinse water and slowly rung the washcloth out on top of her. Then I tried to rinse her hair the best I could by dumping the rinse water over her head. It was a process but it worked:) GL to you, I know it's rough having a little one with a cast.