Doctors don’t know why some people get this. Some types of chemotherapy and medicines may be more likely to cause it than others. You might hear this type of problem called mild cognitive impairment or chemo brain. Brain radiotherapy and surgery can also affect your concentration and learning. But the effects can also happen to people who have not had these treatments.
There may be other causes for these changes. For example, the side effects of medicines, low red blood cells (anaemia) or extreme tiredness caused by treatment. It is important to speak to your doctor or specialist nurse if you are worried about this. They will look at what is causing your difficulties and give you help and advice.