High state of mind is manifested as relaxed and happy, feeling good about themselves, feeling that everything around them is very beautiful, feeling that their lives are gorgeous and colorful, and they are also incredibly happy and joyful. The whole day is full of joy and complacency. The happy state of mind is quite vivid and vivid, in harmony with the inner experience, and has a certain degree of infectiousness, and often can cause the surrounding people to resonate. The mood can be unstable and irritable, often treating the interference and opposition of others with hostility or rage, but easily provoked and the mood often lasts for a short time. Its main etiology includes the following points. 1, genetic factors. The main characteristics of cyclic personality are sociability, cheerfulness, wide range of interests, good movement, easy excitement and optimism, and also easy to become worried. Patients with mesodermal type skeleton, muscles and connective tissues are more often affected than those with ectodermal type slender and delicate physique. 3. Abnormalities in the function and metabolism of the central nervous system.