Both stress, treatment and depression can cause fatigue and just general clouded thinking. So plenty of rest, optimum nutrition and exercise can really make a difference. I didn't have radiotherapy but chemo. I have found exercise and using my brain have helped. But enough rest and the addition of a multivit and fish oil made a huge difference. Becoming overtired is my enemy. Finding tbe balance is challenging.
I needed a diary and notepad to assist with memory. I often couldn't recall an instruction at work. I still use both but at least now remember what is in it. Kath x