I have a tinge in my knee that comes and goes. It starts soon in to my run, and can stay or get worse throughout the run. When this knee pain befalls, I usually go through several weeks of modifying my gait and my shoes, until I find the right combination, and it goes away.
I also battle it by changing sides of the road when possible, because it is mostly on the inside leg when I run on crowned roads.
However, recently I realized that this knee pain is caused by a pair of shoes I sometimes wear to work. When I wear these shoes, even for one day, I develop knee pain when I run. Shelving this pair allows me to run with no knee pain.
Don’t always blame running. Sometimes running is the stress that exposes underlying issues.