hello and welcome,
Lesion or bump seen on the gum line can be due to formation of abscess.
Abscess discharge from the gums is seen due to two reasons .
either it is a gingival abscess
caused due to accumultion of bacterial plaque
and calculus deep in the gum pocket and the surfaces of roots of the teeth .
or it can be a periodontal or periapical abscess
arising from an infected tooth.
This can be confirmed by a X RAY examination which will show the amount of tissue involved accordingly treatment can be carried out .
If it is a tooth related abscess , it is drained and infected tooth is treted by root canal
if it is a gingival abscess , the abscess cavity is curretted and gums are cleaned by scaling and root planing of tooth surfaces.
consult a dentist
and get the clinical examination and evaluation done by X rays.