First 3 steps when runners feel a lump in the leg

I was doing a second opinion webcam consultation with a runner who noticed a lump in the calf muscle. 
 
The knot in the leg wasn't limiting his running. In fact, when he was running, this lump in the calf muscle felt better, not worse. 

So, you have to wonder, could the knot "not" be a big deal? 

There are really 3 things a runner can do immediately after noticing a bump in the leg.
 
Today on the Doc On The Run Podcast, we're talking about the three steps you should do as the very first thing when you feel a weird lump in your calf muscle.