Usually people walk and run with their toes forward. But some people walk and run with splayed feet inside and outside. Internal and external splayed feet refer to the toes inward or outward when walking and running. It can be divided into mild, moderate and severe internal and external splayed feet. The included angle between the medial and lateral edges of the forefoot and the longitudinal axis is less than 5 degrees, and it is mild above 5 degrees, moderate above 5 degrees, and severe above 10 degrees.