Final answer:
When caring for a patient with stomatitis due to radiation to the neck, it is best to administer topical analgesics as prescribed to relieve pain without causing further irritation.
Step-by-step explanation:
A nurse planning care for a patient who is receiving radiation therapy for the neck and has developed stomatitis should include administering topical analgesics as prescribed. This care approach is essential as it focuses on providing pain relief directly to the affected area without promoting further irritation that could be caused by spicy foods or alcohol-based mouthwashes. Medications such as topical analgesics are available to alleviate symptoms like stomatitis, which is common with radiation therapy and can provide relief and promote healing.