Don't point your sleeping feet at the doors and windows.

When sleeping, safety, quietness and stability are the most important. The door is the only way to get in and out of the room, so don't point the door at the bed or the bedside, otherwise people who sleep in the bed will feel insecure and harmful to their health.

I can't sleep with my feet to the window. Feet catch cold easily. There is Yongquan point on the sole of the foot, which is an important point of the kidney meridian. Therefore, when the cool wind enters this acupoint, it is not an ordinary cold, but manifested as low back pain and abnormal urine test.