Hi I'm Ethan

And I have been a little worried for a little while now, reason being is, I've been itching after a shower and itching at nightsln my back, it gets worse at night, it's an uncontrolled itch to the whole body and I look like I'm dancing when I'm itching it's such an horrible feeling, I hop into the shower just to get rid of the itch but I'm im itching for a solid hour, but my fiancé spoke to someone who worked In a chemist anc she said to have a blood test it could be to do with my liver, so I did all research and it come up with lymphoma cancer, and my old friend has beaten it not so long ago and he felt the same as me, and he seems worried and wants me to get checked out ASAP, is anyone here able to help me? I want true answers