Penis Girth Has Suddenly Become Larger At the Shaft.

Hi, i've recently noticed the girth of my penis in the middle of the shaft has become much larger, whilst the tip (beneath foreskin) has remained the same. This is the case for when it is both erect and un-erect. Besides the fact it looks strange i'm curious as to why this has happened and whether it is a problem/medical issue. There is no pain associated with it and I am uncirumcised. I am 19 years old and still in puberty but if it were naturally growing would it not grow proportionately? It feels more kinda swollen and the skin around it also feels like its become a bit more loose and flacid, however like I said there is no pain or discomfort at all.


Any help or advice is greatly appreciated.