Re: outer edge foot pain
I have also experienced pain on the outside of my foot. You may try doing some research on lateral column pain. The fact that you describe the pain as an ache leads me to believe you are not experiencing nerve pain which is most often described as shooting pain (like an electrical current) or a stabbing pain (like someone is stabbing the area with a very sharp knife).
So if it isn't nerve pain what could it be? Well, you could have some tendinitis in the peroneal tendons - they run behind the outside ankle bone and down the outer edge of your foot and then cross under the bottom of it. You may also have some type of stress injury like a stress fracture from repeated stress to a bone like the 5th metatarsal. The other possibility would be arthritis developing in any of the several joints that are on the outside of your foot. Tendonitis and arthritis are usually very achey. Tendonitis is more likely than arthritis to be tender to the touch. If you have a stress fracture from repeated trauma to a bone it would be very difficult to stand or walk. Taking all of this information into consideration I am guessing you either have tendonitis or possibly arthritis.
I have had problems with my peroneal tendons - the dr prescribed anti inflammatory gel (which you have tried) and physical therapy (to use ultra sound and steroid gel treatment). It was relieved once I did PT and started wearing better shoes. I also have arthritis in several joints in my foot - my os has prescribed all sorts of conservative methods - nsaids, rocker soled shoes, orthotics, pain medication, physical therapy, injections, and I have even gone as far as fusing my ankle and subtalar joints.
I would suggest you make an appt with your primary physician and see what they say. If the pain is effecting your daily life or impairing your activities you may want to talk to your dr about seeing a podiatrist or board certified orthopedic surgeon who specializes in sports medicine/foot and ankle.
You can also look up lateral column pain, so you can learn more about the anatomy and biomechanics of the foot.
Keep us posted and feel free to ask any other questions you may have.