It is likely that the lesion is infected. You will require a TT injection if you haven't had it within 6 months. You will require antibiotics, antacids, antihistamine, painkiller and a topical antiseptic. If the problem persists or worsens visit the ER at the earliest.
Next Steps
Follow the steps as advised
Health Tips
If condition persists or worsens visit the ER at the earliest