There are many physiological factors affecting vascular reactivity, such as strenuous exercise, mental stress, sudden excitement and so on. 1. Strenuous exercise: Exercise will cause blood vessels to dilate, body temperature to rise, increased sweating, etc., which may cause blood reflux in the lower extremities, affecting blood circulation, deepening muscle fatigue, and may lead to shock in severe cases. 2. Mental tension: excessive tension will affect the health of people, resulting in loss of appetite, affecting sleep, is not conducive to physical and mental health, it is recommended to maintain a good mental state, relax the mind to relieve stress. 3. Sudden excitement: due to the surrounding environment, affecting the mood, so the mood is more pleasant, happier, etc., will feel the spirit of the mood is more exuberant, excitement, more words, enthusiasm and so on. If there are adverse symptoms can not be relieved, it is recommended to consult a doctor in time.