What is outside foot pain? Foot pain varies in areas of the foot.  There are so much things that can cause foot problem. This is because the foot is a weightbearing structure. We also stuff the foot into dark and moist footwear which can cause a whole host of problems. Pain can occur anywhere in the foot and outside foot pain is common. The outside of the foot is also known as the lateral side of the foot. Many things can cause outside foot pain also. It varies from pressure of the shoe to a tendonitis of the peroneal tendons to a stress fracture of the fifth metatarsal to a nerve impingement. So if you experience outside foot pain, better know the cause in order to treat the said condition.