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HomeAnswersDentistrypericoronitisWhat could the sore bump behind my tooth be?

What could a sore bump behind my last molar on the right side of my mouth be?

The following is an actual conversation between an iCliniq user and a doctor that has been reviewed and published as a Premium Q&A.

Medically reviewed by

Dr. Sowmiya D

Published At January 11, 2018
Reviewed AtFebruary 12, 2024

Patient's Query

Hello doctor,

I went to the dentist four days ago, and now I am noticing a sore bump behind my last molar on the right side of my mouth.

Answered by Dr. Honey Nandwani


Welcome to icliniq.com.

The probable diagnosis is pericoronitis. As per your symptoms, the sore bump behind the last molar tooth can be either due to an abscess formation. It can be due to an injury, or it can be due to an erupting wisdom tooth that might be putting pressure over the gums. Another cause can be inflammation of the gum flap in that area caused due to food accumulation between the gum flap and the wisdom tooth. For confirmation, a clinical examination and an X-ray are needed. I suggest antibiotics like Augmentin (Amoxicillin and Potassium Clavulanate) and anti-inflammatory painkillers like Ibuprofen can help. Consult your specialist doctor, discuss with them, and with their consent, take the medicines. Application of numbing gel containing Lignocaine (Lidocaine Topical) over the bump will also help. A warm saline gargle and an antiseptic mouthwash gargle can also be used. You need to avoid hard foods to prevent irritation of the area, keep the site clean, and maintain meticulous oral hygiene. Follow up with the X-ray.

Same symptoms don't mean you have the same problem. Consult a doctor now!

Dr. Honey Nandwani
Dr. Honey Nandwani


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