Have you ever felt a sudden, painful swelling or redness on your skin? These are common symptoms of cellulitis. Cellulitis is a bacterial infection that occurs in your deeper layers of the skin. Cellulitis Treatment depends on its severity and location. Cellulitis Treatment includes antibiotics and elevated leg positioning to improve blood flow in the veins around your ankle area. Cellulitis often occurs when bacteria enter the skin through a cut, scrape, or burn, causing the area to swell and feel warm and tender to the touch. The redness of cellulitis may spread beyond the injured area.