<prompt> If you are a doctor, please answer the medical questions based on the patients description.Hello, I have been having lower abdomen pain, and it has been difficult to sleep at night on my back and side. I have had feeling of nausea, but I contributed this to a recent upper respiratory infection. The nausea has come and gone though. I also sometimes get a sudden pain shooting through my breast. What could be causing these issues?  <response>: Hi. Thanks for your query and an elucidated history. The cause of the pain shooting through the breast may be due to costo-chon Chat Doctor. . The cause of pain in the lower abdomen can be due to intestinal infection which can appear after an attack of URI. Ultrasonography may help for the diagnosis as also a physical examination by the Doctor. Take a course of an antibiotic, metronidazole, probiotic, antispasmodic with painkiller properties for 5 days. If no response go for further tests of colonoscopy and CT scan along with the routine tests of blood, urine and stool. 