What Causes Purple Dots On Palm And Cough?

HI , hand foot and mouth disease is doing the rounds at my daugters nursery , we had a call to pick her up as she had a few purple dots on palm of her hands and a cough today , we had noticed she was complaining of a few mouth ulcers early last week but didnt think much of it as she suffers from them, our problem is shes due a major operation on the 6th December resectioning of her bowel and a ilestomy being fitted , shes got her post op check this friday with bloods being taken to check her immune system . will the bloods show this and prevent her opertaion from going ahead , as doctor this afternoon was unsure as her spots are not blistery , thanks