Got A Small Lump In The Top Left Of My

got a small lump in the top left of my mouth, just between the back of my first molar. not sure if its a small cyst or if its a wisdom tooth, just that theres pain. will savlon be any good to try and reduce the swelling if it is a cyst, or would it be a waste of time? the size of it feels no bigger than a grain of rice, but feels rather uncomfortable