Went for a doctor and he adjusted it as it was :)
He said the gel has to be kept to cure by itself and not to pull the foreskin until it's getting cured. However, since it is inside the foreskin now, the pain is not there.
He also advised me to do a circumcise before getting married.
Now I am relaxed and special thanks to NOHARD... :)
why you have got it back just give it a good wash, to remove this ring of gel, it should not be there, behind your foreskin should be clean, and be cleaned daily, then just give an oiling and see if it comes back, but you should try streaching it daily, its just getting your small finger behind it should do, and as you do this then get your second small finger behind as well to incress the streach, it takes time and over many months, try having a look on pegym for more info on foreskin streaching.
Good Luck
NOHARD, many thanks for the reply.
I didn't try to stretch it since it gives a strange feeling for me (pain + tickle) :(.
It looks like a gel is inside that ring (like a tube around the head) which is connected to the frenulum.
However, I too feel go for a doctor.
Good Luck