If almost six months baby recently sleep at night is always restless, parents need to pay attention to: 1, vitamin D deficiency, now children are more golden, rarely be launched to the sun, the family is afraid of catching cold, blowing wind, etc., at home through the window sun is not possible, the sun’s rays will be mostly absorbed by the glass, so basically useless, no sunlight will limit the generation of vitamin D, vitamin D deficiency The child will have irritability, crying, night sweats, and sleep is not solid and other symptoms, parents should give the child timely supplementation of vitamin D, at least until the age of two. 2, the amount of activity before going to bed too, six months of children have slowly begun to learn to crawl on their own, if the child is too much activity before going to bed, will stimulate the brain nerve excitement, resulting in the night sleep is not solid, irritable.