A fatty bulge at the base of the neck — commonly known as a “buffalo hump” — isn’t always just a cosmetic concern, as experts say it can sometimes signal an underlying condition. As more Americans grapple with poor posture, obesity and chronic conditions requiring long-term medications, experts warn that these factors can contribute to the development of “buffalo humps.”  There are a range of possible causes and treatments for the commonly misunderstood condition,  Health.com  recently reported.