Bloody Belly

[keg_1981]

My Ball Python had a bad shed about 3 months ago, i called the vet and they instructed me to give him a bath. He completed his shed and then shed again immediately, I was told that is because the bath dried him out. Since then he has shed twice and after each shed (which goes well, in one piece) there seems to be a bit of blood between his scales on the lower half of his belly does anyone no what is causing this?