Basically I'm 16 and I have recently realised that if I masturbate more than twice within a week the next day the end of my penis will become red and sore, it causes irritation between itself and the foreskin which creates a itching sensation, this sensation is almost always different as sometimes it is hardly noticeable and sometimes it is extremely irritating. It also creates small amounts of hot yellow/white puss in what seems to be in my foreskin as I have never noticed it coming out of my urethra.
This scares me as I have no idea what it could be, I know that some STI's do cause puss to leak from your penis, but I haven't had sexual intercourse so it is not an STI unless I was born with one given to me by my mother, however I doubt that as all women in England are checked for STI's when they are pregnant. I have read up about similar stories to mine and I have seen a lot of differnet advice but I don't know what to do.
So please, if you know anything about or even similar to this then could you please reply and give me advice.