Hi I hope it's ok to post this. I noticed yesterday some very random bruises on my sons back, he's only 2 and although very active and clumsy but  the amount of bruises and where they are is worrying me. I have read that bruising can be a sign of leukaemia. Can anyone advice on what I should be looking for and what leukaemia bruises actually look like. The ones on my songs back are only small but yellow in colour he has about 7 of them