Body fever and dizziness may be due to stress, overwork and other physiological factors, but also due to upper respiratory tract infection, pneumonia and other diseases. 1. Physiological factors: usually patients usually live or work under greater pressure, and do not pay attention to rest, overwork, there may be fever and dizziness, which is a normal physiological phenomenon. 2. Upper respiratory tract infection: usually due to viral and bacterial infections, and also related to anemia, immune deficiency, chronic respiratory diseases, cold and other factors. In addition to fever and dizziness, symptoms such as cough, runny nose and nasal congestion often occur. 3. Pneumonia: usually caused by pathogens invading the lung parenchyma, and also related to smoking, air pollution, impaired immune function and other factors. Patients will experience symptoms such as depression, fever, shortness of breath, etc. Some patients may also experience fever and dizziness. These are only some of the common causes. If symptoms persist or recur, seek medical attention. After a clear diagnosis, follow the doctor’s instructions to standardize the treatment.