I always imagined something similar to a rooster's spur, this big gnarly growth coming out of your ankle:
Unfortunately, WebMD did nothing to alleviate my fears. Apparently bone spurs are not like rooster spurs - they're just a little bit of extra bone: A bone spur (osteophyte) is a bony growth formed on normal bone. Most people think of something sharp when they think of a "spur," but a bone spur is just extra bone. It’s usually smooth, but it can cause wear and tear or pain if it presses or rubs on other bones or soft tissues such as ligaments, tendons, or nerves in the body. Common places for bone spurs include the spine, shoulders, hands, hips, knees, and feet. [...] For example, the long ligament on the bottom of the foot (plantar fascia) can become stressed or tight and pull on the heel, causing the ligament to become inflamed (plantar fasciitis). As the bone tries to mend itself, a bone spur can form on the bottom of the heel (known as a "heel spur").
Look at the "heel spur" link! *weeping* This is doing nothing for my paranoia! Thank you, WebMD. Thank you.
Please tell me you have a ridiculous phobia, too. Please?