<s>[INST] i am a 29year old male. I have pulsating feeling with mild pain on my left side below my belly button which comes and goes on and off since 6 days. I would like to know what is the cause of it? Does it need any immediate medical intervention? Anticipating an early reply.Thankyou [/INST] Hi. Do you also have any change in your bowel habit - meaning any nausea, vomiting, constipation or diarrhea? The cause should most likely be in your small intestine. Please get an Ultrasound of the abdomen and Pelvis done and tell your Radiologist to also rule out an Abdominal aneurysm. Do you have any urinary burning or frequent urination? Do let me know the result and then we can advice you further on the right course of treatment further. Take care.Dr Rishi from Delhi, India. </s>