There are many different reasons for sore feet that affect such a high percent of people. One not so common reason is a enlarged bone along the side of the arch area of the foot is often an accessory navicular. The navicular bone is a bone at the top of the arch in the middle, shaped a bit like a banana. On the side of the navicular on the mid-foot region it can be prominent or might have an additional piece of bone adjacent to it. This enlarged bone or additional piece of bone can be painful due to pressure from the shoes. Scenarios that may be especially problematic is in sports like ice skating when the prominence of the bone pushes on the very hard boot that is worn. This can be very painful. The other problem, as a result of enlargement is that the tendon is not as powerful as it needs to be and a flattening of the foot can happen.
Treatment options for an Accessory Navicular is determined by the opinion of the treating doctor and exactly how you get the pain. If the symptoms are as a result of the size of the lump on the shoe, then padding in the shape of a donut can be used to protect the spot. If that is not really beneficial then surgical excision of the enlarged bone is needed. This isn't as simple as cutting off the enlarged bone, as the tendon needs to be removed first and then the bone taken out and then the tendon has to be put back. If the pain is as a result of the muscle and tendon unit not working properly and a flat foot is the outcome, this is best treated initially with foot supports. If that's not helping, then a surgical intervention might be needed. The choice of treatment will depend on the actual cause of the pain, the age and activities of the person with the problem and what the wanted result is.