The phenomenon of swollen face often occurs in people with poor blood circulation, including people who are used to drinking a lot of water before bed, or people who have to drink water at night, people who are often sedentary, people who usually have a heavy diet, like spicy or salty food, people who often stay up late, and people who are born with poor metabolism. Of course, it also has to do with improper sleep position at night, the pillow is too low. There are women who are more likely to have swelling of the face, including swelling of the menstrual cycle, pregnancy swelling, heat swelling, and idiopathic swelling. If you are normally in good health and have sudden swelling of the face, you should consider whether there are any of these problems. There are also systemic diseases that cause swelling of the face, such as heart failure, nephritis, nephrotic syndrome, advanced liver disease, malnutrition, hypoproteinemia, anemia, hypothyroidism, etc., but they are more likely to be seen in people who are older and often have underlying diseases. If the swelling persists for a longer period of time, you should be alerted and go to the hospital to clarify if there are any pathological reasons for the swelling.