Cause of lip swelling a mystery

DEAR DR. GOTT: My 80-year-old mother has been suffering with lip swelling and redness for three months and we can’t seem to find a remedy. They are swollen and red, slightly chapped, but not blistered.

Her family doctor has prescribed long-term Valtrex and lip ointments for herpes but they have had no effect. She was also given Lotramin ointment without success. We have asked her about medication changes, toothpaste changes, etc. but we can’t seem to find her any relief.

She has a dermatologist appointment in the coming weeks but we thought you might have an idea for relief a bit sooner. Thank you for any ideas you might offer.
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