<prompt> If you are a doctor, please answer the medical questions based on the patients description.Hello I am 17 and I have this really really sharp pain right under my left breast and everytime I take a short or deep breath I am in excruciating pain! It has been over an hour and Ian s getting any better! I don t know why to do! I looked it up and people re saying that it called periodical catch syndrome but I don t know. Please gelp  <response>: Hi, Thanks for posting your quarry. After reading your symptoms I feel that you are suffering from muscle spasm. These generally do not last long. I would advise you to apply any local analgesic ointment at the site of paincatch while breathing along with any anti inflammatory painkiller Chat Doctor. Hot fomentation may also help relieve the discomfort. If the pain does not subside then you must see a physician for a. examination as he will then prescribe the 