There are several reasons for having a lot of dreams at night: 1. Due to mental factors. Generally when people are nervous, strained or stressed at work will cause brain neurasthenia, in this case at night when sleeping will do a lot of dreams. And dreams are more chaotic, there will be nightmares of this phenomenon, this situation can only be alleviated through their own spiritual regulation; 2, sleep at night with a lot of dreams and diet, when eating spicy, stimulating food or consumed with excitatory food and drink, there will be more dreams at night this situation. This situation is due to excessive excitement of nerve stimulation, can be alleviated through dietary regulation; 3, sleep at night with a lot of dreams may also be the body suffering from a certain disease, such as cerebrovascular disease or the emergence of nutritional and metabolic diseases, will appear this situation, such as anemia and other diseases.