Panic and shortness of breath and weakness in summer should be considered to be related to physiological factors, environmental factors and disease factors. 1. Physiological factors: in hot weather, the body is prone to sweat a lot, in this case, with the sweat, a lot of water and electrolytes out of the body, will lead to dehydration and electrolyte disorders in the body, easy to combine with the panic, generalized weakness. 2. Environmental factors: many people in the summer because of the heat, usually stay at home always closed doors and windows, long time to blow the air conditioning, will lead to air circulation, when the oxygen content is relatively low when the body fatigue chest tightness symptoms. 3. Disease factors: (1) low blood pressure: because of the summer temperature rise, will cause blood vessel expansion, sweating increase, are caused by the factors of blood pressure drop. When the blood pressure drops, it will cause the blood supply of the organs of the whole body to decrease, so there is chest tightness, fatigue, shortness of breath. (2) Myocardial ischemia: some patients with ischemic heart disease will be induced by the hot weather, myocardial ischemia symptoms worsening, resulting in systemic blood supply deficiency, which can be manifested as panic attacks, shortness of breath, generalized weakness. In summer, if the symptoms of panic, shortness of breath and weakness occur for a long time, it is recommended to consult a doctor in a timely manner, under the guidance of the doctor to improve the relevant examinations to determine the cause of the systemic treatment.