I Have A Pimple On My Gums What Is The Pimple On The Back Of Her Gums?

What is the pimple on the back of her gums? - i have a pimple on my gums

Hello, my daughter 10 months, which looked like a pimple on the gums back into the background. That is, within 3-4 months. It is in the molars were new. Suddenly it's gone! I wonder if this could be a tooth? However, a molar 10 months? Who suggestions on this? Let me know! Thanks