李某,男,29岁。1977年8月就诊。自述两月前到外地做木工,因缺蔬菜,纯以辣椒代菜,为时将近一月。回家后未及半月,即觉舌根部有强硬不舒感,又将半月,突然出现笑证,迄今已40多天。其表现为每日大笑发作数次,每次持续10～20分钟,有时由目睹外界事物而引发,有时则无缘无故地发笑。每次发作前,脐右旁似有一硬物往胸部上 Lee, male, 29 years old. August 1977 treatment. The self-reported two months ago to do woodwork in the field, due to the lack of vegetables, pure pepper substitutes for nearly January. Less than half a month after returning home, I felt that the roots of the tongue were hard and uncomfortable. In addition, half a month later, I suddenly appeared with a joke. So far it has been more than 40 days. It manifests itself as a number of daily laughter episodes, each lasting 10 to 20 minutes, sometimes caused by witnessing outside events, and sometimes laughing for no reason. Before each episode, the right side of the umbilicus appears to have a hard object on the chest