I am 64 year old mail. 2 years ago I had a green light laser procedure for an enlarged prostate. I still have some urine retention, which my doctor said is normal, but have noticed the past 3 days a twitching near my left kidney area. There is no pain, but wonder what is causing it
Thank you for asking!  Age of 64 has its geriatric limitations. Twitching is quite a vague term to explain what's going on. A procedure 2 years back does not look like to be connected here anyhow. Try some acetaminophen and skeletal muscle relaxants like relaxing or tizanidine and if the symptoms persist seek the nearby physician and let them sort out after detailed history and physical examination. Take care