Lump At Top Of Gum Red Lump On Gum? What, Why, How?

Red lump on gum? What, why, how? - lump at top of gum

The other day my sister told me about a problem with the rubber, but did not do, because they do not know what it is.

It has) a small red bump on upper gum (on one of his front teeth.

She wants to know what it is, we are about this (she wants to see a doctor to see) and can be treated?

She also said that swells up and disappears.
It took about 6 months, but only swollen for 5-10% of the time.

Thanks in advance!