How can i treat this??

Question unclear but: Are we talking about a boil? One can get a boil treated by his primary care doctor. Most 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 if needed.