my 21month old baby boy is in good health,is average weight and height, he has got like a puss pocket at the side of the head of his penis, i have to pull his skin back slightly,to see it ,this has happened four times now,the first and last time his penis swelled up twice the size and when in the bath i put slight pressure on the spot head it bursts and greenish puss comes out after four or five sqeezes it all out but theres quite alot of it, then the two other times it has been in the same area but on the other side of his penis it was like the puss had gone hard and was more like whitesh stuff you would get from a white head,one of those two times it came out like a stork which i pulled out,each time there a pinhead hole left behind? can help me please