The inability to concentrate may be related to being active, insecurity, lack of confidence in doing things, impatience, or inability to do things quietly. Inability to concentrate may also be related to brain tumors, brain atrophy, brain infarction or other diseases or brain cell damage, so the cause should be determined before treatment. The inability to concentrate may also be related to neurasthenia, difficulty sleeping at night, poor sleep quality, and excessive dreaming, resulting in daytime sleepiness, lack of energy, inability to concentrate, and memory loss. It may also be related to the side effects of taking anti-anxiety and anti-depressant medications frequently, using the brain for a long time, resulting in excessive fatigue or suffering from heart disease, stomach disease, etc. It should be treated actively and pay attention to the combination of work and rest.