Dizziness, shortness of breath and weakness of legs can be referred to cardiovascular medicine, respiratory medicine, neurology and other departments according to the patient’s condition. Dizziness, shortness of breath and weakness of legs are only symptoms and clinical manifestations of the disease, which need to be based on the patient’s accompanying symptoms, clinical manifestations, etc. for appropriate examination and treatment. 1. Cardiovascular medicine: if the patient is accompanied by symptoms such as chest tightness and pain in the anterior region of the heart, consider coronary artery disease, etc., and need to go to the Department of Cardiology in the hospital, and undergo electrocardiography, cardiac ultrasound, coronary angiography and other related tests to further clarify the diagnosis. 2. Respiratory medicine: if the patient is accompanied by cough, chest pain, fever and other symptoms, such as tuberculosis, pneumonia and other diseases, you need to go to the respiratory medicine department of the hospital for chest radiographs, chest CT, blood tests, tuberculin test and other tests to further clarify the diagnosis. 3. Neurology: If the patient has severe headache, numbness of limbs and other symptoms of cerebrovascular disease, you need to go to the Neurology Department of the hospital, head CT, blood pressure, blood lipids, blood sugar and other related tests to further clarify the diagnosis. Patients with symptoms of dizziness, shortness of breath and weakness of the legs need to go to the hospital, after a clear diagnosis of the cause of targeted treatment, do not take medication without authorization.