O.K. Thank you for the additional information and clarification.
The list of things that can cause left lower quadrant (LLQ) abdomain pain is somewhat lengthy, just because there are a few different structures in the area that can become a source of a pain. If you are, as you report, a man this simplifies things a bit for us, which is helpful.
The most obvious possibility, perhaps, is the colon (large intestine). Something as simple as gas or constipation can produce LLQ pain, and if you are otherwise without symptoms, then this may just be gas. Gas and bloating can cause pain since they distend the intestine - this pain can come and go, but can be relatively intense. You don't mention any constipation, so this seems less likely.
You don't mention any other symptoms, but other potential causes of LLQ pain include diverticulosis and diverticulitis, infectious diarrhea, irritable bowel syndrome, appendicitis (although it is often in the right lower quadrant), colon cancer, bowel obstruction or perforation, or even necrotic (dead) bowel. This is obviously a long list, but many of these will often also cause other symptoms besides only pain.
Diverticulosis can initially show up like this with a vague complaint of intermittent abdominal pain like you describe, and it can be common in people at your age. In essence, diverticulae are small outpouchings that develop in the large intestine, and these can become periodically irritated. People with diverticulosis are encouraged to maintain a high fiber, high fluid diet, and exercise (among other things) as these can all help keep this disorder in check.
Since you are without other symptoms, I think that anything else on the above list is probably far less likely.
The kidneys are another potential cause of LLQ pain, but if you are able to urinate normally, without any pain or irritation, and are symptom-free otherwise, then I think that this is also less likely.
I would recommend keeping a vigilant eye on this. If your symptoms don't resolve on their own spontaneously, or if they get worse, then please see your physician as soon as possible. As long as this doesn't progress, this might just be a case of gas or a passing diverticular "episode". If it is recurrent, and a diagnosis of diverticulosis is reached, then additional treatments might be recommended.
Regarding your heart disease and stent placement, I imagine that these stents were inserted through your groin. So long as the insertion site looks clean, dry and has healed then this is a potentially unrelated issue. If you do suspect the insertion site or anything else cardiac-related, please do not hesitate to call your physician or phone 911. Better safe than sorry, in my book.
I hope this helps. Please let me know if you have any further questions - I'm more than happy to try and help. Take care - Dr. Fay
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