Why Do I Get Tight Feeling In My Upper Calf By Putting Foot On The Ground?

my right foot points outward slightly. when i postion my foot foward and place it on the ground and slightly bow my leg outward i have a hard time keeping my foot on the ground. i get a tight feeling in my uper calf like it feels like the tendon im dont know whats its called plz help me. i have tried siting and pointing foot inward or strate and bowing leg outward trying to keep foot flat. no problem left foot