Recently, I've been unable to concentrate. Halfway through the book, I get distracted and think about why this sentence is said. Then, I can't understand this sentence after thinking about it

The inability to focus could be due to the brain being distracted and unable to focus on the task at hand. In this case, you can try the following methods to improve your focus and concentration: 1. Create a quiet environment to minimize noise and interference. 2. Make sure your body is in a comfortable position, such as standing or sitting up straight to avoid bending over or feeling uncomfortable. 3. Try some physical exercises such as deep breathing, meditation, or yoga to help improve your brain's cognition and concentration. Try some relaxation techniques such as meditation, deep breathing, or gradual muscle relaxation to help reduce stress and anxiety and improve concentration. Make sure you get enough sleep and maintain a healthy lifestyle. If the above methods cannot improve your attention and concentration, it is recommended to consult a professional doctor or psychiatrist for better advice and treatment plans.