The floor is cold, long-term sleep on the floor is harmful to the body, as follows: 1, the floor tends to adsorb cold, moisture, if long-term sleep on the floor, it will lead to wind, cold, damp evil invade the body, thus causing muscle, joint pain, and even rheumatism, may also induce skin diseases, such as eczema. 2, because the floor is hard, sleep on it not only can not relieve fatigue, but also may lead to near the floor side of the Limb blood circulation disorders, thus inducing back pain, leg pain, and even body aches and discomfort, etc., seriously affecting the quality of sleep. 3, if long-term sleep on the floor, will lead to a decline in human resistance, it is more likely to be external evil, the most common symptom is easy to catch a cold, fever, cough, runny nose, sore throat, headache and other symptoms, so it is best to choose the bed when sleeping.