1. Physiological reactions during the period of rising body temperature: In the early stages of fever, as body temperature gradually increases, the body will initiate a series of physiological reactions in response to the invasion of pathogens, including the release of certain hormones and neurotransmitters. These substances may stimulate the central nervous system, leading to emotional excitement, increased alertness, and other phenomena.
2. Accelerated brain metabolism: During fever, due to the increase in body temperature, the metabolism of the brain will correspondingly accelerate, which may lead to an increase in neuronal activity, resulting in states such as mental excitement, active thinking, or difficulty falling asleep.
3. Psychological and emotional factors: In addition to physiological reasons, psychological factors may also affect emotional states during fever. Patients may develop a "fighting" mentality due to their concern for the condition, expectations for the treatment process, or urgent desire to recover their health, manifested as emotional excitement and positive coping. Some patients may also feel restless and agitated due to the discomfort caused by fever, manifested as emotional fluctuations.