If lips are swollen?

The timing can offer clues. Swelling after a new food, medicine, toothpaste, lipstick or cosmetic treatment may reflect an allergic or irritant reaction. A tender area with redness, warmth, a cut or discharge can point towards inflammation or infection. Biting, burns and other injuries can also cause local swelling. Angioedema is a deeper swelling that can affect the lips and sometimes the tongue or throat.

Stop using any newly introduced lip or dental product and avoid the suspected trigger. Place a cool, clean compress over the area for short periods, keep the lips hydrated, and do not puncture blisters or squeeze a sore. Note when the swelling began, what touched or entered your body beforehand, and whether it is spreading. A clinician can assess the cause and choose treatment; do not take someone else’s prescription medicine.

Call emergency services immediately if swelling is accompanied by trouble breathing, wheezing, throat tightness, difficulty swallowing, faintness, confusion, or rapidly increasing tongue or facial swelling. Seek prompt medical advice for fever, severe pain, pus, spreading redness, recurrent episodes, or swelling that does not settle. These features need assessment rather than home observation.

Ask what is the most likely trigger, whether this could be angioedema, which products or medicines to avoid, and what warning signs should prompt emergency help. If episodes recur, ask whether an allergy review or written action plan would be useful.