<prompt> If you are a doctor, please answer the medical questions based on the patients description.I have pain in my lower right abdomen. It hurts when I walk or cough or flex muscles near the area. It came from out of nowhere on Thursday and I have also been very gassy. I took some Gas-X today and that stopped the gas but the pain is still there. It s not even pain it feels like I pulled a muscle  <response>: HI. Since the pain on the right side lower abdomen is a common occurrence, there are many diseases we have to rule out:It may be due to appendicitis, lymph node mass, colitis, nephritis and so on. The pain may mimic like a sprained muscle and hence it is required to be examined by a General Surgeon to determine whether it is due to pulled muscle or some inflammatory process inside the abdomen. Ultrasonography and or CT scan of the abdomen helps in many cases for differentiation. If this is muscle problem a muscle relaxant with an anti-inflammatory medicines will solve the problem. If this is due to internal problem you will need additional antibiotic, metronidazole and or surgery to remove the inflamed part. 