Elderly people who feel feverish despite having a normal body temperature are considered to be related to factors such as neurosis, autonomic dysfunction, and incorrect temperature measurement. 1. Neurosis: The occurrence of neurosis is related to factors such as genetics, brain damage, personality traits, and negative life events. Patients experience complex clinical symptoms such as palpitations (rapid heartbeat, often accompanied by panic), chest tightness, insomnia, fatigue, and some patients may feel feverish. 2. Autonomic dysfunction: Autonomic dysfunction is related to behavioral styles, physiological characteristics, personality traits, mental stimulation, psychosocial and other factors. Autonomic dysfunction can involve multiple systems throughout the body, with a wide range of subjective symptoms, such as chest tightness and shortness of breath, nausea, loss of appetite, anxiety and depression, and self-consciousness of body fever. 3. Incorrect temperature measurement method: the elderly feel feverish, after measuring the body temperature does not rise, can also be considered with the measurement time is too short, thermometer damage and other factors. You can replace the thermometer with a new one and take temperature measurements several times. The elderly body temperature is normal, but feel fever, if necessary, can go to the hospital for examination, clear cause, so as not to delay the disease.