Swelling and pain in the hard palate is considered to be related to infection. In some cases, localized damage to the hard palate is caused by a foreign body during feeding, especially fish food, which causes localized injury to the fish spine, resulting in swelling and pain secondary to the retention of the foreign body. In addition, patients with primary infections, such as rhinitis or sinusitis, may experience pain in the hard palate in severe cases, even with fever, headache and dizziness, which should be treated with effective anti-infection therapy and, if necessary, surgical drainage. You should pay attention to a proper diet, do sports and exercise, and stay away from the smoking environment, as some patients smoke, which can also lead to the aggravation of rhinitis.