How to make the itch stop?

I have cellulitis and I can not get this itching to stop! It's up and down both sides of my chest and stomach, all over both hips, down my thighs, and on my feet. Also on my back, and back of my knees. The rash on my thighs are all dried out and its very painful. Would a warm bath or shower work? I need help... I've been miserable for the past 4 days, idk what else to do. Calamine lotion isnt working.