You can take steps to help prevent staph infections. Any time you have a cut or skin breakdown, wash it with soap and water, keep it clean and dry, and keep it covered. A couple of recent outbreaks among football players began when one team member had a boil and the infection was spread to other team members.
A staph infection is contagious if the wound is weeping or draining and if people share towels or other items that are contaminated. Wearing foot coverings in locker rooms and other commonly used areas can help prevent contamination.
If the sore becomes unusually painful or red, get prompt medical attention. If red lines develop, that's a sign the infection is spreading and needs immediate medical attention.