Changes in Mood or Thinking

Anxiety (a feeling of worry or unease), fear, uncertainty, anger, and sadness are common feelings that patients and families sometimes have when coping with cancer. They are normal responses to the many stresses of cancer.

Many people with cancer deal with depression. It can often be due to chemical changes caused by cancer treatment. 

When the thought process is disturbed, or when a person has trouble thinking and acting like they normally do, they may be confused. 

Chemo brain is a mental cloudiness people getting chemotherapy sometimes notice before, during, and after cancer treatment.