Dear Dr. Hollmann,
For a few months, I've been experiencing discomfort in one ankle and in the heel of the foot on the same side. I haven't aggravated it at all (that I'm aware of), so I'm wondering what might have brought it on. It's not a constant shooting pain, but more of a dull ache and discomfort when I walk. I'm wondering if I should get it checked by a doctor.

Since the problem has persisted for a few months and is causing limitations, seeing a doctor would be wise. It sounds like you have a pretty minor problem involving tendon or ligament strain. For example, you could have plantar fasciitis, an inflammation of the broad fibrous band that runs along the arch of the foot and connects at the heel. This may have caused you to alter the way you walk, thus straining your ankle. An injury to these structures is not always a memorable event, like a major ankle twist with swelling and bruising. Yet, the discomfort can be more vexing and prolonged.

Your doctor will also consider conditions like nerve compression or a stress fracture based upon your history and an examination. If the joint looks swollen, arthritis could be a cause as well. There are too many possibilities to comment further in a useful manner. An exam is likely to narrow down the possibilities.