yes i am a 25 yea old male who wants to gain weight i weight a 130lbs so i started to take amino fuel 1000 a few days ago but after like a day and i half i notice that my penis started to swell with a slight pain, i didn't notice it until after i masturbated but any time before when i would masturbate my foreskin never swelled up could this be from the amino fuel pills by any chance.
I sympathise with you greatly as your symptoms almost exactly match mine. I also experienced them for the first time at around the same age as you and also tried maturbating before I could ejaculate.
As Swanleb says, medical evidence suggests that it is impossible to cause shrinkage by over-masturbating. At the same time however, medical evidence suggests it is impossible for a penis to shrink at all and the experiences of myself and several other people who post on this forum contradict that opinion.
How bad is the shrinkage? Is it your length or girth that is affected? Have you experienced any pain in the area?
The only advice I can give you is to try and not ruin your life by obsessing about it like i did. Twelve years on from when I first noticed my penis getting thinner it still works, even if I do experience a lot of pain in it and it's not as thick as it once was. Enjoy life as much as you can, try not to let this bother you and do not let it stop you forming relationships.
Good luck and hopefully you will have more luck in getting the problem resolved than I have.
Yes masturbating too hard can damage your penis. It usually only causes chaffing or redness though not swelling. I don't believe you can damage your penis by trying to masturbate too early. Also having an erection for 9 hours straight is very bad their is even a medical name for the problem though I can't remember what it is. If you persist to have erections for very long lengths of time you should definately consult your doctor. Also it has been medically proven time and time again that you can't shrink your penis by masturbating too much. Hope I was of help to you.