Im mainly a mile two mile type runner and 2 weeks ago i injured my hamstring running a 400. i had a lot of pain in between the middle of my hamstring and my butt. i thought it was just a minor pull and i rested for until tuesday and i did some light jogging tuesday and wednesday and today i noticed there was dark black bruises over the tendons(?) in the back of my knee and a lot of pain in that area. it confused me because thats not where the pain was until after i tried to run. does anyone know what this means or had any experience with this?