To prevent cellulitis, keep careful watch over your skin so that it will not become cracked, cut, or scraped. The bacteria that cause the infection enter through small cuts or cracks in the skin. Use lotion to keep your skin hydrated, and keep your fingernails and toenails short and take care not to cut the skin around them. Additionally, you should wear shoes that fit properly and protective gear when playing sports. If you already have a cut on your skin, keep it clean and covered with a bandage. You can also use antibiotic ointmeny to prevent bacteria from invading the area. Watch the cut for redness, drainage, or pain and see your doctor right away if you notice any of these signs of infection.