It is not unusual to lose a little weight during radiotherapy but if you are having any problems with eating it is important to tell the radiotherapy staff. They can arrange for you to talk to the dietician. Skin care Some people develop a skin reaction while having radiotherapy. This normally happens after three to four weeks. The degree of the reaction depends on the area being treated and the individual person's skin.
Some people have no skin problems at all.
Staff at your radiotherapy department will be able to give you advice on how to look after the skin in the area that is being treated. Advice may vary from one hospital to another. Some departments will tell you not to wash the treatment area at all while you are having treatment. Do not rub the area as this may make it sore. Soaps and talcs, deodorants and perfumes may also make your skin sore and should not be used.