Gum swelling and pain can be seen in oral diseases or systemic diseases. Patients with obvious discomfort are advised to eat mainly rotten noodles and thin rice, and can eat more fresh fruits and vegetables such as bitter melon, carrots, oranges and kiwi. Always remember to rinse your mouth or brush your teeth after meals to ensure clean oral hygiene. It is important to note that in reality, the severity of each patient’s condition can vary significantly from individual to individual, and diet is only one part of the treatment of the disease. Therefore, it is recommended to seek medical advice for any discomfort, and your doctor will be able to develop an appropriate treatment plan and give you reasonable dietary advice according to your specific situation.