Thanks for the question. There are lots of different reasons for having a bump on your lip, so it is important to speak with your doctor
. Some of the most common ones include infections. Infections come in two different types: bacterial and viral. Bacterial infections can have lots of pus, cause lots of pain, and cause fevers and other infectious symptoms. Viral infections tend to not be as painful or have as much pus in the local area, tend not to cause a high fever
, and are slightly different in other ways. An infected lip from a virus or bacteria can cause swelling on the inside of your lip. Some common viral infections include things like cold sores. Other causes of a swollen lip include swelling of the glands that secrete mucous from the lining of the inside of your mouth. These glands are everywhere, and when they get blocked, swelling and tenderness can occur. Of course, another possibility for any swelling is something more serious such as a cancer, although this generally does not appear in a very short fashion, but rather starts small and grows. As you have a question about this, you should discuss it with your doctor to make sure you get the care you need. Please speak with your doctor.