The bottom of the child’s foot is swollen by the prick, the first thing to do is to treat the wound, use medicine to prevent infection, and timely inoculation of tetanus vaccine. 1. Treatment of wounds: If there is a residual foreign body inside the wound, the first thing to do is to clean out the foreign body, clean out the local dirt, and then localize the saline rinse, apply iodine povidone to disinfect. 2. Prevent infection with medication: you can apply antibiotic ointment locally to the wound, such as erythromycin ointment, compound polymyxin B ointment, etc. Patients with large wounds also need to take antibiotic medication orally to prevent infection, such as cefuroxime, clindamycin and so on. 3. Vaccination against tetanus: the mortality rate of tetanus infection is relatively high, and tetanus vaccination should be given in time to avoid tetanus infection. The severity of the same disease is different, the treatment may be different, it is recommended to choose the appropriate treatment under the guidance of the doctor, the above drugs should be used in accordance with medical advice.