An irritation or problem with any of these structures can cause lower back pain and/or pain that radiates or is referred to other parts of the body. Many lower back problems also cause back muscle spasms, which don't sound like much but can cause severe pain and disability. View Lower BackPain Videos. While lower back pain is extremely common, the symptoms and severity of lower back pain vary greatly.
1. New York City. New York is the largest cities in the United States and the center of the New York Metropolitan Area, one of the most populous metropolitan areas in the world. New York exerts a significant impact upon global commerce, finance, media, art, fashion, research, technology, education, and entertainment.
Largest Cities in United States - by Population 1-300. Following 300 largest United States Cities are arranged in order by population. Please note that many cities have surrounding suburbs which increase the total population for their area dramatically. However, the figures below are for the exact city boundaries.