Sometimes a child may do such a thing without any reason too. Once in a week they can be irritable or lethargic. If the child is passing urine 6 to 8 times in a day than it can be normal only. It can however be due to several reasons like Colic Earache due to cold Post febrile irritability Post vaccination Constipation Runny nose Breastfeeding mother having fever etc Danger signs: not at all taking feeds, irritable or lethargic, fever for more than 1 day, fast breathing etc