Gum swelling and pain is more serious at night, may be related to the body’s immunity at night, oral infection aggravation and other factors. 1. The body’s resistance or immune status at night is worse than in the morning, when the same pathogenic bacteria are more likely to attack the gum tissue, resulting in an increased inflammatory response, so when the body’s resistance is poor, the symptoms of swollen gums caused by a variety of factors will also be aggravated. 2. After a day of eating, the bacteria in the mouth will also increase, if you do not brush your teeth at night will lead to an increase in oral bacteria. The increase in the number and type of bacteria will also increase the invasive power, resulting in the most serious swelling and pain in the gums. 3. At night, the oral cavity is in a relatively anaerobic environment, the pathogenic bacteria multiply, which will lead to more serious swelling and pain in the gums. If you find that the symptoms of swollen gums aggravate, you should consult a doctor in a timely manner, do not take medication without authorization, so as not to delay the condition. Pay attention to oral hygiene care, quit smoking and drinking, and maintain a regular routine.