Sometimes extracted tooth area is painfull for few days. But do consult with your doctor. Sometimes their is mild infection formed post extraction. Warm saline water rinses two to three times a day may be help ful.

Persisting pain for more than 7 days is of immediate concern. Kindly visit your dentist back to evaluate and reinitiate bleeding over the site to resume healing. Apply rexidine ointment at the site of pain and ulcerations.

Don't brush hard Don't gargle hard Soft drinks should not be taken Gargle saline water twice a day It will heal slowly

Hello... Sometimes the extraction site takes a little more time than expected to heal completely, if the pain is mild no need to worry. If the pain is moderate to severe you can visit your dentist again to see if the extraction site is healing or not. If you are getting ulcers this frequently you should get a thorough check up done... it could be due to rigorous brushing, trauma from teeth, reactions or allergies, taking hot and spicy food or due to any deficiencies.