it usually occurs when I have been laying down for a long period of times. Exercise or moving around causes the pain to go away. Recently I have noticed some pain on the right side of my chest, shoulder pain, back pain and leg pain. I am a moderate smoker and have smoked less than 30 packs. The pain on the left side was present before I started smoking. I am wondering if all the pains are related and should I be concerned. I have been having chest pain on the left side for a year and a half. It usually occurs when I have been laying down for a long period of times. Exercise or moving around causes the pain to go away. Recently I have noticed some pain on the right side of my chest, shoulder pain, back pain and leg pain. I am a moderate smoker and have smoked less than 30 packs. The pain on the left side was present before I started smoking. I am wondering if all the pains are related and should I be concerned. I am 19 years old.