I have athlete and fungus feet but now my heel is itchy and has red bump or rash looking and itchy why?

Tinea Infection: Athlete's foot (aka foot fungus, aka tinea pedis) can present itself as a rash that is scaly and dry as well as a rash with bumps (raised blisters). The itchy feeling is due to the irritation/inflammation from the fungus infection. It is your body's way of responding.

The same thing: Athletes foot is caused by the fungus and the topical medicine needs to be effective to make it better.

Acute athlete's foot: The first thing that comes to mind is that this is one of the presentations of acute athlete's foot. Use drying soaks (epsom salts or dilute vinegar) and a topical antifungal... I prefer patients use lotrimin ultra or Lamisil (terbinafine) cream. You can use certain-dry pads or solutions to decrease perspiration. If this doesn't work, see a podiatrist and be sure to inform them of what you have tried already.