What to Expect from Radiotherapy for Basal Cell Carcinoma

Radiotherapy uses focused radiation to damage basal cell carcinoma cells in a defined treatment area. Before treatment, the radiation team maps the lesion and nearby tissue, chooses the dose and angle, and may make small marks or use a mould to help you keep the same position. During each visit, you remain still while the machine delivers treatment; the session itself is usually brief, and the team is nearby.

The treated skin may become pink, dry, tender, darker, or more irritated as visits continue. Hair in the field can be affected, depending on location. Healing often continues after the course ends, so the appearance during treatment is not the final assessment.

Wash as instructed with lukewarm water and a gentle cleanser, then pat rather than rub. Use only products approved by the radiation team on the field, and avoid unapproved creams, adhesives, friction, and heat. Wear soft clothing where possible and protect the area from direct sun. Keep every scheduled visit or tell the team promptly if illness, transport, or skin breakdown makes attendance difficult. Do not scratch peeling skin or remove crusts yourself.

Tell the radiation team about rapidly worsening pain, open or wet skin, bleeding that does not stop with gentle pressure, pus-like drainage, fever, or difficulty eating, drinking, seeing, or moving a nearby area. Seek urgent help for severe bleeding, breathing problems, or sudden swelling. The team can change dressings and prescribe suitable pain or skin treatment.

Ask why radiotherapy is recommended over surgery or another option, how the field will be protected, which products are safe, what late skin changes are possible, and how recurrence will be checked after healing.