What Is Haglund’s Deformity? 

Also known as Haglund’s Deformity (or “pump bumps”), heel bumps are a bone enlargement on the back of the heel bone. These usually occur for athletes when the shoes they wear rub up against the heel, and they can be aggravated by the height or stitching of a heel counter of a particular shoe. The result is a painful bump or bumps on the heel that make exercising very difficult. Another term used for this condition is pump bump because it can frequently occur with wearing high heels as well.