My son was restrained at School earlier this week as his behaviour was getting out of control. I am not in agreement with it but believe it could have been necessary. My issue is that he has visible injury on the backs of his arms just at the back of his arm pits which look like his clothing has been so tight on his skin it has caused blood to come to the surface. I need advice on whether I can take it further in the form of a complaint? Any advice would be greatly appreciated. Many thanks in advance