Bad breath and swollen gums are often caused by inflammation of the gums due to anaerobic bacteria growing in the mouth as a result of patients staying up late and not paying attention to oral hygiene.
You can first adjust your daily routine, prohibit staying up late, avoid spicy and stimulating diet, eat more vitamin-rich fruits and vegetables, cultivate the good habit of rinsing your mouth after meals and brushing your teeth on time in the morning and evening, establish a good oral hygiene environment, and observe whether your symptoms are relieved.
If necessary, rinse, wipe and rinse with 1% to 3% hydrogen peroxide solution or you can consult a medical professional and take anti-anaerobic drugs such as metronidazole under medical supervision.