This is because:
1. Cement or ceramic tiles on the ground will absorb moisture and dissipate cold, even if you live upstairs. So sleeping on the floor is easy to make pathogenic wind, cold and dampness invade the human body. Coupled with the hot weather, people sweat a lot and sweat holes are open. If they sleep on the floor, they are more vulnerable to wind, cold and humidity, which will directly cause pain in bones, muscles and joints, and even induce rheumatism, shoulder, waist and back pain, hip and limb pain.
2, because the floor is hard, sleeping on it can not only relieve fatigue, but also feel sore and uncomfortable, affecting the quality of sleep.
3, experts remind that if you always knock on the floor, it will make the body's resistance decline, and people are prone to colds, fever, cough, sore throat or headache.
So for the sake of health, it is best not to sleep on the floor for a long time.