<s>[INST] My 12 year old daughter has been saying that she has discomfort on her left side as well as her left shoulder under her shoulder blade bone. At first I thought it might be muscle strain because we started working out or maybe air caught under. Not sure if that is the case anymore. She says it hurts when she laughs, coughs, sneezes, etc. Need a little direction. Thanks [/INST] Hi,From history it suggests that this is muscle strain giving this problem.While playing or doing some mischief with friends or doing some sports in school there might be having some muscle catch causing pain while laughing, sneezing due to stretching of muscles at that time.Nothing to worry, apply some analgesic, muscle relaxant locally.Ok and take care. </s>