Sleeping on the floor is generally not recommended for children over 9 months old. The temperature of the ground is generally lower, more than 9 months the child sleeps on the ground, the child’s resistance is not as good as that of adults, the body in direct contact with the ground is easy to catch a cold, resulting in diarrhea and other symptoms. And there will be more mosquitoes on the ground, the child’s skin is already more delicate, if the mosquito bites may appear itchy skin and other symptoms. It is generally recommended that 9-month-olds sleep in a softer bed, and try to provide children with a quiet and comfortable sleep environment, so as not to seriously affect the child’s sleep quality. 9-month-old children sleeping on the floor after abnormal symptoms, the need for timely medical treatment and timely intervention to avoid delays in the treatment of the condition.