If the patient has sudden onset of dizziness with dyspnea, in young people with good health and without excessive primary underlying disease, all exercise can be stopped and rest can be taken quickly. If there are medications such as quick-acting heart pills or nitroglycerin at home, they can also be taken in small amounts under the tongue and the patient can be observed. However, for elderly people with obvious underlying diseases, such as coronary heart disease, hypertension and cerebrovascular disease, it is important to quickly call 120 for help and arrive at the hospital for consultation. In the process of waiting, at home if there is oxygen and oxygen absorbing device, you can use oxygen bags or oxygen cylinders for oxygen therapy, and you can take drugs such as quick-acting heart pills nitroglycerin under the tongue, and if there are antihypertensive drugs can also be taken appropriately. It is important to keep the patient calm, stop all exercise and try to maintain a sedated state.