Sore throat after radiotherapy for nasopharyngeal cancer may be caused by damage to the corresponding part of throat, which can be handled by light diet, symptomatic treatment and medication. 1. Light diet: once nasopharyngeal cancer patients find themselves with sore throat after radiotherapy, it is better to take light diet to avoid further damage caused by spicy and stimulating food, which will help to relieve pain and get better as soon as possible. 2. Symptomatic treatment: as there is sore throat and pharyngeal burning and edema related, anti-swelling treatment can be given. Dexamethasone + Lidocaine + saline, which is commonly used in clinic, and appropriately and frequently consumed, can reduce the swelling, relieve the pain and improve the edema. 3. Drug treatment: Nasopharyngeal cancer patients with obvious pain can also take aminophenol dihydrocodeine tablets and opioids to relieve pain under the guidance of doctors. Nasopharyngeal cancer patients need to consult doctor in time once they find themselves and have sore throat after radiotherapy, and standardize the treatment after perfecting relevant examination under doctor’s guidance. If medication is needed, it should be taken under doctor’s guidance, do not use medication blindly.