Side effects from radiotherapy to the head and neck area

Radiotherapy can cause a sore mouth and throat because the cells that line these areas are very sensitive to treatment. Radiotherapy can also cause the salivary glands to make less saliva (spit). This can lead to a dry throat or mouth. Saliva can become thick and stringy, making swallowing and speech a little difficult too.

Sometimes radiation to your head and neck can cause a stiffness in certain facial muscles. This is called trismus. Special exercises can help with this.

Radiotherapy can cause hair loss, but only in the area being treated. Most hair loss is temporary and will start to grow back within 2 to 3 months of finishing treatment. But hair loss in the treatment area can be permanent, depending on the radiation dose

Radiotherapy to your neck, may cause difficulty with swallowing. The discomfort will usually ease 5 to 8 weeks after you finish treatment. Radiotherapy can also affect the taste buds in your mouth. You may find that food tastes bland, salty, metallic or like cardboard. If this happens, you may lose interest in food.  Your taste and appetite should improve once treatment has ended.

Radiotherapy to your neck, in particular your larynx, may cause the sound of your voice to change or you may lose your voice for a while.  Your speech and language therapist will explain this side-effect to you in more detail.