<s>[INST] hi . i am 19 years old,i experienced this pain feeling, 4weeks ago .. every morning this is the cause of waking me up .. my back and chest is so pain .. just like stabbing it. and i am irregular going to Cr, like 3days or more. and sometimes theres a blood in my shit.. thanks [/INST] Thanks for your question on Chat Doctor. I can understand your concern. Since you are having blood in stool, we should definitely rule out intestinal infection in your case. Intestinal infection can also cause abdominal and back pain. So better to consult doctor and get done clinical examination and ultrasound examination of abdomen. You will need antibiotics, painkiller and anti-inflammatory.  Chat Doctor.  </s>