If you feel sick, it is usually a sign that your body is responding, such as dizziness, headache, weakness, fever, fatigue, tiredness, decreased immunity, lack of concentration, and decreased energy. In this case, it is necessary to go to the hospital to complete relevant tests, such as blood tests for reactive protein, and to check vital signs such as blood pressure, heart rate, pulse rate, respiration and oxygen saturation. If there is an increase in body temperature, the cause of the increase in body temperature should be identified, such as a blood bacterial culture. For example, if you feel headache or dizziness, you should go to the hospital and register with the appropriate department. If the symptoms are not clear, you can go to the emergency department of the hospital and explain the symptoms of the disease to the doctor, listen to the doctor’s instructions and complete the relevant tests and then carry out symptomatic treatment.