### instruction:
If you are a doctor, please answer the medical questions based on the patient's description.

### input:
Hi, I have what feels like a bony lump on the inside of my lower gum line, I thought it may be an impacted wisdom tooth but my dentist said I have my wisdom teeth and it is just the oblique bridge? Sometimes it feels tender/sore , i only noticed it in the last 6months or so. I am sure at my last dental visit when having X-ray for root canal that I seen a horizontal tooth, could this be the problem, do I need to see another dentist?

### output:

Pimple on gums can be because of gingival abscess which can occur because of impaction of foreign objects such as tooth brush bristles or some hard foodstuff on gums or can occur because of periodontal abscess which occurs because of spread of inflammation from gums to the periodontal tissues. Bump on gums can also occur because of infected tooth adjacent to the gums. Abscess or infection if present in the tooth can move from tooth to bone and surrounding tissues and can cause bump on gums. It might be a canker sore. If bump on gums is because of gingival abscess, then the cause of abscess is removed.  Chat Doctor.  If pimple on gums is because of periodontal abscess, then scaling, root planning is done. Periodontal surgery may or may not be required. If bump on gums is because of infected tooth, then root canal treatment of infected tooth is done to remove the infection. If it is a canker sore, then it will heal on its own in 7-10 days. Without clinical examination, it is difficult to give definite diagnosis. You have to visit your dentist for definite diagnosis and treatment. By the time you visit your dentist, you can do warm saline rinses and maintain good oral hygiene.