Why do I have red itchy skin after rhinoplasty? (Photo)

I just had my open rhinoplasty last Friday so it's been exactly a week and this morning my nose was extremely itchy under the cast so I was able to itch a little around it but now the skin around the cast is very irritated. I've been cleaning my face with witch hazel daily which has never caused me to have a reaction and I put some serum and moisturizer on this morning to cool it down but it's getting worse and I called my doctor but I have to wait until Tuesday for my cast removal...help!