Swollen lips refer to abnormal enlargement of the lips, which becomes noticeable. Medically, it is referred to as edema, and is caused due to accumulation of fluid in the affected region. Being the most prominent part of the face, lips swelling is a cosmetic problem for many people. In most cases, it subsides gradually with time. However, the following natural remedies for a swollen lip is preferred to treat the condition as soon as possible.