Sore throat after cancer treatment: What it could mean

It may not be an infection

Cancer treatments themselves can cause throat discomfort. Dr Singhavi explains that after chemotherapy or radiotherapy, symptoms may result from mucositis or inflammation, reduced saliva causing dryness, or throat irritation.

Other possibilities include viral infections, fungal infections such as candidiasis, bacterial infections, and reflux. Local irritants can also cause persistent symptoms.

“Treatment should be cause-directed,” says Dr Singhavi. If the discomfort is treatment-related, doctors may recommend hydration, saliva substitutes, mouth and throat care and appropriate pain relief. Fungal infections may require antifungal medication, while bacterial infections may need antibiotics.

A sore throat also does not automatically mean that the cancer has returned. However, Dr Singhavi says recurrence or a second lesion should be considered when symptoms are persistent, progressive or accompanied by other concerning features.

Should cancer patients take antibiotics? (Photo: Magnific)

Be more careful during treatment

“It is necessary to be more careful when looking after patients who are receiving chemotherapy, radiotherapy or immunotherapy, especially in cases where the white blood cell count is low,” says Dr Raziuddin Khwaja, Consultant, Medical Oncology, Head and Neck Cancer Institute of India (HNCII).

A sore throat in someone with weakened immunity should not simply be assumed to be a viral infection. Dr Khwaja says doctors need to consider the patient’s symptoms, cancer treatment, overall health and blood counts before deciding on treatment.

“Antibiotics should not be begun without first obtaining medical advice since they are ineffective against viral infections,” he adds.

When should you seek medical help?

Certain symptoms warrant prompt medical attention. According to Dr Khwaja, a cancer patient with a sore throat should contact their doctor if they also develop fever, chills, difficulty breathing or swallowing, intense weakness, persistent cough or rapidly worsening symptoms.

A fever is particularly concerning when the white blood cell count is low and should not be ignored. “Difficulties with eating or drinking, mouth ulcers, dehydration or a marked decline in general health are all signs that should raise concern,” says Dr Khwaja.

So, when are antibiotics needed?

Doctors may examine the mouth and throat, perform a flexible endoscopy and order blood counts or other tests. If needed, Dr Singhavi says, they may recommend CT, MRI, or PET-CT scans, or a biopsy.

A sore throat in a cancer patient deserves assessment — not automatic antibiotics and not automatic assumptions of recurrence. The priority is to identify the cause first, then treat the cause, adds Dr Singhavi.

DISCLAIMER: This article is based on information from the public domain and/or the experts we spoke to. Always consult your health practitioner before starting any routine.