Staph infections are caused by staphylococcus bacteria, and, according to the Mayo Clinic, usually present no problems beyond minor skin infections. Though infections can get into the bloodstream and become far more serious, a staph infection in the nose would likely begin skin-deep.
The Mayo Clinic reports that skin infections caused by staph bacteria fall into one of four categories: boils, impetigo, cellulitis and staphylococcal-scalded skin syndrome. Boils are the most common type of infection, and they may develop into a pocket of pus with a hair follicle or an oil gland. Impetigo generally features a painful rash and large, oozing blisters. Cellulitis usually affects the lower limbs of the body, and infects deeper layers of skin. Staphylococcal-scalded skin syndrome is the result of toxins causing a rash and breaking the skin.