How long does radiotherapy take to work for voice box cancer?

Radiotherapy affects targeted cancer cells over time. The voice may remain hoarse or become more strained while the larynx is irritated, and swallowing can become uncomfortable before tissues recover. A change in voice alone cannot confirm response because swelling from treatment can alter sound and breathing. The clinical team examines the larynx and may use a camera examination or imaging at the appropriate point. Timing depends on the tumour location, treatment intention, and whether surgery or medicine is part of care. Some symptoms settle slowly after the final session, so scheduled review matters.

Attend every session and follow advice from your radiation, speech, and swallowing teams. Rest your voice when it feels strained, avoid smoking, and ask before using throat sprays or remedies. Take small sips and choose textures recommended for safe swallowing. Report increasing pain, coughing with drinks, food sticking, or reduced intake early so support can be arranged. Keep your follow-up appointments even if your voice starts to improve. Ask when the larynx will be examined and what changes should be expected after treatment.

Seek urgent advice for rapidly worsening noisy breathing, increasing throat swelling, inability to swallow fluids, repeated choking, or bleeding. Call emergency services for severe breathing difficulty, blue lips, collapse, or sudden inability to speak or protect your airway. These symptoms need immediate assessment and should not wait for the next review.

Ask when response will be assessed, when your voice and swallowing may begin to settle, and which examination will check the larynx. Ask about speech therapy, nutrition support, pain relief, smoking cessation help, and the symptoms that require an urgent call.