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.
The swelling usually occurs due to some kind of trauma to the soft tissue of the lips. Other causes include extreme weather conditions, dryness, nutritional deficiencies, a viral infection, dehydration, an insect bite, an allergic reaction and using poor quality lip care products.