Eruptions on the face or upper body. Staph infections can occasionally manifest as eruptions or sores on the face or upper body (such a condition being known as impetigo). When on the face, these eruptions are usually sited around the mouth or around the nostrils. They burst easily and dry into a crusty yellow residue. The infected region may itch, and sometimes hurts, but not always so. If a sufferer scratches at the affected areas or tries to remove the residue, this may leave permanent blemishes, and hence, is strong to be advised against.