Dear Fitness Expert,
It seems I have badly strained my intercostal muscles on my right side. The soreness and pain can be pretty excruciating at times particularly when sneezing (felt an actual pop in that area tonight), coughing, and when swimming (I had to give up my 8 miles/week when I had pain when breathing). I want to get back to it slowly but this pain will not subside at all. Each sneeze makes it worse and sleeping stiffens me up.