Dear knsv Prasad I am sorry to hear about your baby boy. I think your boy may haveanal fissure
it happens when very hard stool is passed that injures anal area near
the opening. That area is very sensitive and that is why he cries. You mensioned
he cries when he pass water but if he is otherwise okay I do'nt think he got any
problem with his water work. He should be given to soften the stool.
I think you should take him to your doctor with a sample of urine for culture
and sensitivity. your child should have something to soften the stool. I wish
your son to have speedy recovery. kindest regards Dr. S.K.Mukherjee