When symptoms of dizziness appear, patients should actively cooperate with the doctor in the examination and not panic. Different age groups have different symptoms and different diseases to consider, therefore, different tests are done to determine and rule out the cause. In the elderly, dizziness is usually associated with cardiovascular and brain diseases, and blood pressure, blood count, blood viscosity, electrocardiogram, cardiac imaging, cranial CT or MRI are usually checked. Most dizziness in young people is related to cervical spondylosis, hypertension, hypoglycemia, anemia, etc. The patient’s accompanying symptoms are observed, and blood pressure, blood glucose, routine blood tests, and CT or MRI of the neck are usually checked. Not many children present with dizziness and it is not well described. Most of the symptoms are poor mental health to the hospital for examination and need to determine whether they have a cold, anemia, etc.. Blood tests are usually done and chest CT will be done if necessary to clarify if there is pneumonia. These need to be combined with accompanying symptoms and will not be given blindly, especially some tests that are invasive. Dizziness caused by poor mood and sleep can be resolved through lifestyle modifications, so there is no need to do too many tests. As mentioned above, the causes of dizziness often vary by age and the tests performed will be different, so the choice of tests will be based on the patient’s specific situation.