I have a boil that keeps getting bigger and is extremely painful what should i do?

Doctor may drain it: With a visit to the doctor, a person can get his boil treated. Most boils are treated with drainage of the pus inside. Antibiotics are sometimes, but not always, used after that. For boils that don't look like they are thin enough to lance through the skin, antibiotics may be used to stop the infection... and then a surgeon can remove the non-infected "cyst" at a later time.