What should you know about cracked and swollen lips?

Cracking can follow dry air, lip licking, saliva irritation, or a reaction to a new balm, toothpaste, food, or medicine. Swelling may occur alongside inflammation or an allergic reaction. Angioedema is one condition that can cause rapid swelling of the lips and may affect deeper tissues. The timing, speed of change, other affected areas, and any new exposure help a clinician judge the cause.

Stop any newly introduced lip product and avoid licking, biting, or peeling the skin. Rinse gently with water and use a plain, fragrance-free protective ointment if it does not sting. Note when the swelling began and record recent foods, medicines, dental products, or cosmetics. Do not apply a medicated cream inside the mouth unless a healthcare professional recommends it.

Call emergency services immediately for trouble breathing, wheezing, throat tightness, difficulty swallowing, a hoarse voice, tongue swelling, faintness, or rapidly worsening facial swelling. Seek same-day medical advice when swelling is new, persistent, painful, associated with hives, or follows a medicine or food exposure. A clinician can assess possible Angioedema and advise how to prevent another episode.

Could a product, food, or medicine be triggering this? Do the timing and pattern fit Angioedema? What should I do if the swelling returns, and which lip products are suitable while the skin heals?