The cause of sweating in the back of the head of a child sleeping for one month is mainly due to the following situations: First, it is caused by the covers that are too thick for the child. If parents cover the child too thickly when sleeping, it will cause a lot of sweating in the back of the head and sweating all over the body when sleeping, so you need to reduce the thickness of the covers in time. Secondly, the symptoms caused by children suffering from vitamin D deficiency rickets. Seven-month-old children grow rapidly, if not timely supplementation of vitamin D will cause vitamin D deficiency rickets, resulting in a lot of sweating at the back of the head, there will be sleep unstable and other symptoms, you can give children timely supplementation of vitamin D and calcium carbonate particles.