Im in very good health, 65 years old.  have had ED for about 10 years.  Recently have had very frequent problems w/ maintaining erections during intercourse.  My questions
Hellothank you for trusting Chat Doctor Dear as with any sex toy or device, constriction-rings are safe if used properly.  But no matter if you're using an appropriate sized ring in a safe and proper manner, you must not wear a constriction-ring any longer than 30 minutes.  After a few hours of having an erection for any reason (constriction, pharmaceutical Chat Doctor.  And I mention appropriate size because even short periods of too much constriction can cause similar damage. So dear keep in mind that constriction rings may cause damage if it is not used properly. Please take advice from sexologist if you face problems while using. I think I answered to your question if you have more questions feel free to ask. Take care