<s>[INST] Hello,I have a friend that just expressed a concern for her health. She said she is experiencing pain under her ribcage on the left side shooting through to her back, her vision is blurry and she is extremely fatigued and had noticed sensitivity in her lower left leg accompanied by slight swelling. She is concerned because cancer runs in her family. Any ideas what may be causing this and what we can do while attempting to find her a doctor in this area? [/INST] Thanks for your question on Chat Doctor. In my opinion you should not worry much about her. As I don't think it is cancer. But better to get done some investigation s to rule out other causes. First get done ECG to rule out cardiac cause for left sided chest pain. If this is normal than get done chest x-ray to rule out pulmonary causes for chest pain. If this is also normal than no need to worry much. It is just musculoskeletal pain only. So avoid heavy weight lifting and strenuous exercise. Take good painkiller and muscle relaxant. You will be alright. No need to take stress and tension for cancer. </s>