Hi my 4 year old son started to complain of pain in his penis yesterday, it looked a little swollen at the base and was painful to touch, no pain on urination. This evening he has complained of the same pain, only worse he was crying in agony and was reluctant to let me look, I did manage to take a quick look and there is creamy yellowish puss oozing from the end, it appears more swollen than yesterday but still no pain on urination. What could this be? Thank you