I have dead skin on my feet&inbetween my toes it's a white flakiness almost looks like blue cheese, sometimes it becomes very itchy and has odor?

Poss. Athlete's foot: Worth trying lotrimin (clotrimazole) ultra or miconazole. May be interested inseeing podiatrist if above don't help.

It could be...: Athlete's foot. The best otc medication (in my opinion) is lotrimin (clotrimazole) ultra. Dilute vinegar soaks are good as well. Dry the inside of your shoes by placing them up-side down over an air return vent at home overnight. If this doesn't make things better in a couple days, see a podiatrist.

Itchy and odor: It may well be athlete's foot as already stated . See your podiatrist for assistance