First aid for skin injuries consists of several steps that you can perform to decrease the risk of infection. First, you should be sure to stop any bleeding. Although most minor skin injuries stop bleeding on their own, pressure may be needed in some cases. Blood that spurts or does not stop flowing despite pressure requires emergency medical treatment.
Second, you should make sure the skin injury is cleaned, disinfected, and wrapped. Do this by washing the skin injury with water, applying an antibiotic ointment, and dressing the cut or scrape. Be sure to change dressings on a daily basis, or more frequently if need be. In the case of a burn, applying antibiotic ointment is similarly important. Also, make sure to cool the skin using water to reduce pain.
Finally, first aid requires knowing when to call a medical professional. Severe burns, massive bleeding, or a skin injury that looks infected always requires professional help.