Welcome to healthcare magic!
The spot is actually a growth called an epulis
, cause can be a viral infection, a cyst
, a benign tumor
Better to get evaluated by local examination by an ENT surgeon and if required get it biopsied because such out growths can be an ominous development such as cancers.
You should be proactive in deciding this.
I hope this advise would be helpful for you.
Wish you a great health!