Concerns with memory or concentration can affect many people immediately post treatment, these symptoms often improve over time, but some patients feel their memory or concentration does not feel the same as before treatment for months or even years after treatment has ended. Sometimes this symptom is referred to as “Chemo brain” , it is not just chemotherapy that causes concerns with memory or concentration so you may be experiencing these issues without having received any chemotherapy. For more information on issues with memory or concentration please follow the below links

Cognitive changes (chemo brain) | Macmillan Cancer Support

Cognitive Changes After Cancer Treatment | Livestrong

Chemo brain | Cancer in general | Cancer Research UK