You rat has a bloody nose because it is sick actually the red discharge from his nose is not blood. You should take him to the vet ASAP
Why Does My Rat Have A Bloody Nose? Why Is His Skin Turning Orange?
Orange skin is caused by buck grease.
Rat mucus is red so he just has a snotty nose.
That means that he is sick and he may have a disease in him or her.
Here is a page that talks about the skin of rats changing color.and pets with bloody noses. N.allexperts.com/q/Pet-Rats-3537/Change-skin-color.htm
Someone may have poisoned him or he may be snorting coke.