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小儿的小便次数太多,每天少则20次,多则40余次,各方面的检查均正常,发病年龄多在3～4岁,这种症状,在医学上称为“神经性尿频”。单纯尿频也可见于情绪紧张的学龄儿童。婴儿出生后头几个月内,排尿纯属反射性。随着大脑皮层的发育,到5～6个月时,条件反射逐渐形成,到1岁末,可以训练对排尿的主动控制。新生儿出生后头几天内。因液体摄入量少,每天排尿仅4～5次,1周后,因小儿新陈代谢旺盛,进水量较多,而膀胱容量小,故排尿的次数可增至20～25次,等到能自动控制排尿,间隔会逐渐延长。1岁时每天排尿l5～16次。到学龄期每天6～7次。
Children urinate too much, as little as 20 times a day, as many as 40 times, all aspects of the examination are normal, the age of onset in more than 3 to 4 years old, this symptom is medically known as “neurogenic urinary frequency ”. Simple urinary frequency can also be found in the emotional stress of school-age children. The first few months after birth, urination is purely reflective. With the development of the cerebral cortex, by 5 to 6 months, conditioned reflex gradually formed, to the end of 1 year, you can train the active control of urination. Newborns within a few days after birth. Due to the small amount of fluid intake, urination only 4 to 5 times a day, 1 week, due to strong metabolism in children, more water, while the bladder capacity is small, so the number of urination can be increased to 20 to 25 times until the automatic control Urination, the interval will be gradually extended. Urine l5 ~ 16 times a day at 1 year old. To school age 6 to 7 times a day.