Heel Spur: Heel spurs are painful "spurs" of bone on the bottom or back of the heel. Spurs often develop in areas of chronic stress or irritation. Shoes may further irritate a spur on the back of the heel causing an area of redness and extreme pain. Spurs on the bottom of the heel are often associated with Plantar Fasciitis. Treatments include shoe gear modifications, orthoses, padding, anti-inflammatory medications, and sometimes surgery to remove the spur.