Excessive unrequited love is the heart disease: Xiao Qin since seeing the newly divided colleague Xixi, can not resist the ecstasy of the heart, because he thinks Xixi like him, Xixi in all aspects meet his standards, and he also very much like Xixi, for this reason he launched a fierce love offensive. Although XiXi has clearly told him that he has a boyfriend and will soon be married, but Xiao Qin did not back down at all, but think that XiXi is testing him, even after XiXi married he is still so maverick, so as to make Xiao Qin’s parents puzzled, worried about Xiao Qin’s mental problems, and came to consult. It is true that Xiao Qin suffers from schizophrenia. There is nothing abnormal about this disease on the surface, and it can even be interpreted as an obsession and preoccupation with love, but if we talk and communicate in depth, we will find that there is a fixed and unshakable belief in his thinking activities that cannot be persuaded by common sense or corrected by facts, to use the medical terminology of love delusion and paranoia. These personality defects lead to their inability to treat themselves correctly, to accept criticism with open-mindedness, to deal with various encounters in life realistically, and to go to extremes easily when encountering problems without self-control and regardless of the consequences. The onset of this patient, generally out of character performance is limited to a certain thing or only for some people, for unrelated things and people often do not mention, so there will be a certain amount of camouflage, and increase the difficulty of identification, resulting in artificial misunderstanding, easy to confuse, delay timely diagnosis and treatment. This is the case with Xiao Qin’s excessive monomania. However, when the condition progresses to a certain level, to the point where people cannot tolerate it, and the condition becomes clear, the opportunity for early diagnosis and treatment is often lost, affecting the efficacy of treatment and social functioning, so early detection, early diagnosis and treatment are especially important. The treatment of schizophrenic patients is based on antipsychotic medication, supplemented by psychotherapy, which can generally yield better results.