The Upper West Side is primarily residential, with 209,000 people / 1.9 square miles, meaning about 110,000 people per square mile / 42,500 per square kilometer. The most densely populated city in the world.
Likey allergic rxn: Allergic reaction to a number of things could cause swollen lips with associated itchy (sic). Angioedema can cause swollen lips. Important to note if localized to one area or involves the upper and lower lips diffusely. ...Read more.
An allergic reaction to oysters or other shellfish could cause puffy lips. Exposure to common allergens may cause the lips to become itchy or puffy, in addition to other symptoms. Environmental allergies may cause runny noses and puffy lips. An infection can cause lips to swell and become puffy. Some people suffer from allergies that are triggered by pet dander. An allergic reaction to toothpaste may cause puffy lips.