Last night at midnight My 14 year old son complained of pain in his upper left chest, shortness of breath. I took him to emergency and EKG normal, chest xray normal, temp normal, lungs sounded fine. They ordered a breathing treatment any way as he has a history of asthma. Outcome was inconclusive. Ordered motrin and set us home 3 hours later. He went to this morning and said pain was better. He played basketball in gym said slight pain when he came home. At 10 pm the pain returned worse than before. Gave him extra strength Tylenol had him take a warm shower. When he came out without a shirt I noticed his left collar bone was raised more than right and there was swelling below it in the upper chest area. When questioning him he admitted to doing rigorous sit ups.