I have these white blotches on my sunburn. They don't hurt and are nothing like blisters. What is it?

Maybe... Could either be dry skin where the skin is about to peel off, it could be a blister but there would be clear fluid coming out, or it could be your freckles. If they don't go away, or start to look abnormal, e.g. A mole grows or looks weird, see your doctor for advice. I can't really be precise on what it is unless i saw them in person.