Sesamoid Injury in Foot?

The first metatarsophalangeal joint of my right foot (the joint connecting my big toe to the rest of my foot) has been hurting me for over a year now. It hurts most after running or long periods of walking, but sometimes it will hurt for apparently no reason at all. The pain is generally an ache, ranging from dull and almost negligble to sharp and distracting. I looked up first metatarsophalangeal joint injuries online and came up with a sesamoid injury as a possibility. I used to play tennis regularly and also tend to walk fast, putting extra pressure on my feet. Does this sound like a sesamoid injury? Regardless, what would be the best way to treat it? I have tried taping the area before, which helps with the pain--is there some kind of toe brace I could buy, or a specific way to tape my toe?

Depends on where your pain is. You have 2 sesamoid bones in that area in the sole of your foot. If your pain is in the sole of the foot at that joint then it could be that. Other injuries to that joint are bunions...where the big toe begins to move inward and a big bump begins to form on the side of the foot, and turf toe...which is when your big toe gets bent upward (hyperextension) too much and causes inflammation in the joint. I think you would be wise to see an orthopedic doctor to have a look at the foot to get a proper diagnosis and then the proper treatment for it. I doubt its gonna get better on its own without some treatment.