Hello and welcome to the forum. We appreciate your question but are sorry your doctor wasn't of more help. I am thinking that your doctor perhaps is saying that a watch and see approach is best. If it changes, then more serious action will be taken to determine what this could be. And as for now, it is considered harmless. A benign cyst is a possibility. https://www.medicalnewstoday.com/articles/tonsil-cyst Is the doctor asking you to keep checking it? Or do you have a follow up appointment? And you can always get a second opinion. An Ear Nose and Throat doctor would be excellent for looking at this over a general practitioner.