Pain on lateral of knee when running

[stecappa]

Hi all,

I have been running (not much usualy 7km, twice a week) for almost two years. For the second time I am now feeling a pain on the knee lateral (the outter side). Trying to find about it online, I believe is on the lateral or posterolateral ligament. I am going to let is rest for a week but wonder what types of stretching and exercises should I do for healing afterwards?

Thanks!