Ureteric colic starts suddenly with pain in the loin. The pain radiates from the affected ureter to the front of the abdomen and down to the groin. Occasionally it can also radiate into the testicle in a man and to the labia in a woman.
The degree of pain is very severe. The patient becomes very restless and uncomfortable and may want to lick the room. Typically each episode may last for half to one hour. It is often spasmodic and tends to come and go with an hour or two between attacks. The pain is caused by the stone passing down the ureter or due to its trial to pass down.
Of course babies wet their nappy (diaper) at any time. Becoming 'dry' is a complex process. The urine-producing system has to develop its ability to produce less urine at night, coordination has to develop between the maturing nerves and muscles controlling the bladder, and the ability to wake up when the bladder is full also has to develop. All this takes time. This happens quite quickly in some children, but is slower in others. Boys tend to be slower than girls, so bed-wetting is three times more common in boys than in girls.