Fast-acting treatments for a swollen upper lip include adrenaline injections to the affected area, antihistamines and anti-inflammatory medications such as corticosteroids, according to WebMD. Applying a cold compress to the swollen lip several times throughout the day may also help relieve the swelling.
Heat treatment can alleviate and lessen the swelling of the upper lip by spreading the blood accumulated at the affected site, according to WebMD. Additional home remedies to treat swollen lips include applying aloe vera to the inflamed area or teabags that have been steeped in warm water and cooled before application.
A swollen lip can be due to a number of underlying conditions, including cold sores, inflammatory diseases, neurological disorders and overexposure to sunlight, according to WebMD. Fluid retention, skin sores around the mouth and congestion of the nasal passages can also cause the lips to swell. In rare cases, lips may also inflame due to viral infections, poor nutrition, dehydration, excessive weight or organ failure. Allergic reactions can cause swelling of the lips and are often treated with antihistamines.
Swollen lips caused by mild trauma from bruising or lacerations, burns, insect bites or contact with spicy and hot food typically resolve on their own, according to WebMD. In severe cases, however, the injured lips may suffer permanent disfigurement.