As many other difficulties, cognitive problems can be developed in brain tumor patients. This could affect their quality of life and their communication skills. Cognitive problems include slower thinking, easy distraction, difficulty to concentrate on tasks, losing thread of conversations, slow learning, and slow reaction to certain stimuli. It is very unlikely to present all of the cognitive problems listed at the same time, and most people experience them differently. However, if you find any of these in your case and become worried about the sudden nature of your cognitive changes, talk to your doctor about your concerns.