MRSA may cause a skin infection that looks like a pimple or boil. The infection often looks like a spider bite. It can be red, swollen, and painful. It may drain pus. These skin infections commonly occur at sites of visible skin trauma, such as cuts and abrasions, and areas of the body covered by hair (e.g., back of neck, groin, buttock, armpit, beard area of men). If you think you may have a skin infection, see your health care provider. Sometimes MRSA causes more severe and potentially life-threatening infections, such as bloodstream infections, surgical wound infections, or pneumonia.