If you’ve had trouble concentrating on a task, remembering words or directions, doing several things at once, or recalling a date or phone number, you may be experiencing chemobrain. 
Even though you may have never heard of it, chemobrain is real. It describes thinking or cognitive problems, such as issues with memory, which start after cancer treatment begins. Chemobrain is a side effectinfo-icon of treatment that can cause you to feel in a fog, frustrated and worried.
Look below for more information from LBBC about chemobrain.