Catherine F. Poh, DDS, PhD, FRCD(C)Correspondence to: Dr. Catherine F. Poh, Faculty of dentistry, University of British Columbia, 2199 Wesbrook Mall, Vancouver BC V6T 1Z3. Email: cpoh@interchange.ubc.ca Content by this AuthorCharacteristics of Emergent and Essential Dental Services in University and Hospital-based Settings During COVID-19 Pandemic in Vancouver, CanadaHow do I evaluate a patient with a swollen lip?