A good sleeping environment is the first step to a comfortable sleep. First, please check your bed. If the mattress has obvious depression, or the hardness of different areas varies greatly, even there are many stains, it is recommended to replace a mattress. The mattress at home should be replaced every 5 years, and the mattress with good quality can be used for about 10 years. Then see if the pillow is comfortable? The right pillow can obviously improve the sleep quality. You can choose the right height and hardness according to your sleep habits. The height should be about 8-12cm.