Patients with dizziness and chest tightness when soaking in hot springs mainly have the following reasons: 1, because the water temperature of hot springs is relatively high, the peripheral blood vessels of patients in this environment will be dilated, which will easily make the effective circulation of blood insufficient and lead to insufficient blood supply to the heart and brain, and patients will experience dizziness and chest tightness. 2, when soaking in hot springs is hot, patients sweat more, and if they can not timely 3. When the air humidity is high, the air pressure is low, and the lack of oxygen in the air also leads to symptoms of chest tightness and dizziness.