Obesity or regional adiposity is one of the components of EMS. Regional adiposity is an accumulation of fat in certain areas, such as around the nuchal ligament in the neck (cresty neck), development of fat pads close to the tailhead, supra-orbitally (just above the eye) or fat accumulation behind the shoulder or in the prepuce (sheath) or mammary gland region. Obesity is common; however some horses have a leaner overall body condition with accumulation of fat in only certain areas.