If there is a lump there on one side of the vagina towards the bottom, it's probably a blocked gland. This is called a Bartholins gland cyst
. To help it, you can apply moist heat or take a bath soak. For 10 minutes 2-4 times daily can help soften the gland and release the fluid. If it continues to get larger and starts to hurt, it may be needed that a doctor open the gland to drain the fluid.