A broken foot with redness, swelling, heat, and pain should be considered a local inflammation or cause a skin infection in the foot. Generally need to choose anti-infective drugs for treatment. If it is relatively light, you can choose topical iodophor, Bactrim, erythromycin ointment for external rubbing for treatment. If it is more serious and causes redness, swelling, heat and pain in the whole foot, or even the inflammation spreads up the calf, causing increased local pain, or even fever and malaise, you need to choose sedative antibiotics for treatment. Generally, cephalosporins or penicillins are used for the treatment, and the course of treatment is about 7-10 days. Once the condition worsens and causes dermatophytosis, it needs to be treated with penicillin for about 2 weeks.