Sharp stinging foreskin pains around the area which attaches to the back of the head?

I'm 17 and regularly masturbate around once a day, sometimes once every two, but have recently developed a sharp stinging pain on my foreskin around the area which attaches to the back of the head. I initially thought it to be phimosis, but I've been able to retract my foreskin normally since puberty so I'm unsure whether this is the case, although repeated masturbation or attempts at stretching exercises seem to worsen the pain.

As I say, the sharp stinging sensation seems to temporarily disappear if I leave the foreskin alone for a day or two (presumably to heal in some way). The problem became more noticeable when this area of foreskin tore slightly during masturbation, nothing major aside from a minimal amount of blood (of which hasn't occurred since), where the area in question has been more red in colour, worsened further by any itching as a result of the subsequent irritation; perhaps the issue is in a skin tear, and by stretching it, the skin is further irritated?

It's worth noting that I don't believe this incident to be the root cause, as I've known this pain to occur two or three times before this, so my main question is that of a possible solution; I'm assuming something of an ointment or cream of some kind if indeed the issue is skin related, and again I don't believe this to be an issue of foreskin tightness as it's never been an issue in the past (although I'm not willing to rule it out as a possibility just yet).

Alternatively, as I only masturbate once a day or so, the foreskin isn't retracted on an occasional basis and I only clean the underside with toilet paper after ejaculation - perhaps it could be an issue deriving from hygiene? It doesn't feel the case, although I can't be sure. 

I would rather not have to worry about pain during masturbation, or even when I retract my foreskin for that matter - my main concern is that this is only a recent development, leading me to believe I myself have agitated the issue rather than it being a strictly bodily one. Thanks in advance.