I am 16 and I retracted my foreskin by myself...and the foreskin is somewhat collected under the head of penis...iam scared..is it normal??
While you have it back rinse it well with plain water then just let it slip back over if it wants to or leave it back. Either way is fine.
No, it is not normal. That condition is called paraphimosis. Now that you know the name you can look it up and see what to do to get your foreskin back where it belongs.