Girls, help me! Who had a cyst on their gums? I have been sick for a l…

Girls, help me! Who had a cyst on their gums? I have been sick for a long time, the runny nose is gone, but coughing was from them, and then for a few days I felt that it was unpleasant to eat on one side, then I touched a ball under this tooth on the gum with my tongue, you can feel it with your tongue. And again my throat got sick. How did they treat it? I don't understand why? Infection?