Introduces what people of different ages need to pay special attention to when brushing their teeth 20-40 years old: It is best to brush your teeth three times a day. People in this age group are susceptible to hormonal influences that cause gum sensitivity and tartar growth. Therefore, it is necessary to brush your teeth about three times a day, especially for pregnant women, who should floss more often to remove tartar and pay attention to the phenomenon of bleeding gums. 40-60 years old: Use mouthwash with it. In this age group, previously accumulated dental problems begin to amplify, so special attention should be paid to the prevention of gingivitis and periodontal disease. It is recommended to brush your teeth at least twice a day for no less than 2 minutes each time, floss after each meal, and use mouthwash to enhance the cleaning effect as appropriate. Over 60 years old: Brushing action should not be big. As you age, your gums will slowly shrink and the roots of your teeth will be exposed, and the roots are the most sensitive part of your teeth. Therefore, it is recommended to use a soft-bristled toothbrush and toothpaste with less abrasive content. The brushing action should not be too large, but in small circles to reduce the stimulation to the roots.