Oh my gosh, I completely forgot to tell you my coschondritis came on after I had an upper respiratory virus! When I would lay down at night on my side, it felt like my ribs were in the way on that side, and too big, it was uncomfortable, and I would have to change positions alot, then when I went to doc for what I thought was my heart, she found tender areas in my rib cage when pressed, which I thought was weird, then a few months later is when I got the pains, right when it snowed and got about 20 below 0. I read it can last up to a year, it seemed to be coming on for months before I got the pains. I really don't think stress plays a huge factor in coschondritis, I think docs say that about many ailments when they don't know the cause, but I am positive the weather and strenuous activity does though, how else could 4 people in up in the ER at the same time???? That is not a coincidence. Many people here had been shoveling, and the weather turned bitter cold. Yours came on around the same time too! I had been having symptoms of it coming on for months, but didnt realize it, and winter was coming or either here already when my symptoms started. And the heart monitor, I was having tons of palpitations, it scared the heck out of me, and the one incidence of a fast heart rate, then the chest pains, I had all of this before the coschondritis. I just had a run of ailments in a row, fun fun fun!! First the virus, then stomache problems which I ignored, then chest pains, which in the end after EKG's, wearing monitor home, ended up being an ulcer, then arthritis in my thumb that comes on bad according to the weather, my neck is same according to the weather, then the coschondritis. I am positive the weather and your activites play a huge factor in the coschondritis. Please let me know how you are doing.