It was a very common experience to feel breathless when reading a novel, especially when people were immersed in the plot and might ignore their own breathing. This could be due to the tension and excitement of the novel's plot or the emotional investment. In this case, it is recommended to try to pause the novel and take a few deep breaths to relax. He could also switch to a relaxing novel or read it slowly to calm himself down. In addition, pay attention to maintaining indoor air circulation to avoid excessive concentration and avoid reading novels in an environment with bad air. If this experience continues and causes discomfort, it is recommended to consult a doctor.