I have calluses under my first and 5th toe joints. Is that normal?

No, it is not normal. Calluses under specific areas of the foot are a sign of excessive pressure to it. Pressure points under the foot can be triggered by many reasons. However, one of the most common reasons for calluses under the 1st and 5th toe joints is high arched feet. A high arch foot is like a triangle with the base of it being on the bottom. This results in pressure points under the forefoot and the heel. A biomechanical exam by a podiatric physician is highly recommended in this situation.