Hi Twin Sister
From what you say I would suggest that your little man is playing with it and retracting his foreskin a little further than he should. I suggest that you continue with the polysporin at least twice a day morning and night. And if possible 3 times a day. You can retract the foreskin a little if you really need to but if possible I would be just putting the polysporin on the tip of his penis. Keep an eye on him and if you see him playing with himself then try to distract him.