bartholian cyst?

Evie

hi guys , i’ve had this swollen slightly itchy bump on the inside of my vaginal opening it’s not painful at all but does get bigger if i was to be aroused but goes smaller within a few hours. i’ve been soaking it in warm water at least once a day. does anyone know how i can get rid of it. it’s only small about the size of a pea and i want to prevent it from getting bigger