My hair has been thinning for the last year or so, but I’d attributed it to aging (78) until I looked up ‘follicular miniaturization’, which is what my dermatologist diagnosed. Since then my thyroid readings have been sub- normal, which may also cause it, and I learned that it can be a long but temporary after-effect of general anesthesia. I had an emergency pacemaker surgery 1/4/23 and then was diagnosed with paroxysmal afib a few months later and was put on Eliquis. Then I needed a partial nephrectomy and at Christmas had surgery, from which I didn’t wake up for three days. They think I had a flurry of clots go to my brain because I had to go off the blood thinner for the procedure, but a pacemaker check showed there was no afib incident on the dates of the crisis. So anyway I’m now thinking the hair loss set in last year after the PM surgery and has started again because of the most recent one. My message is just that it can be from many causes. Good luck.