Dorling Kindersley, Ruth Jenkinson/Getty ImagesYour pinky toe might seem like it serves no real function but to look cute. \"The purpose of the pinky toe is to provide balance and propulsion,\" says podiatrist Dr. Bruce Pinker with Progressive Foot Care in Nanuet, New York. In fact, our reliance on the foot's \"tripod\" of balance (the heel, pinky toe knuckle and big toe knuckle) is pretty critical. \"In fashion footwear, the pinky toe can rub against the inside of the shoe until a 'bursa,' which is a fluid-filled sac between the skin and bone, develops. \"Pinky toes are famous for developing soft tissue lesions on the top, tip, or in-between the toes.