When a patient has a headache accompanied by dizziness, nausea and lack of appetite. First, the patient should go to the hospital for an examination to observe whether the blood pressure is elevated, which can cause similar symptoms due to elevated blood pressure. Secondly, a CT examination of the head should be done to exclude the patient from intracranial occupational diseases and acute cerebrovascular diseases in the skull, such as cerebral hemorrhage. Again, blood tests and acute reactive protein tests are needed to detect inflammatory factors in the body, such as upper respiratory tract infections. Due to the action of bacterial or viral toxins, the patient can completely develop headache, dizziness, nausea, and loss of appetite. Finally, patients also need to check the function of the liver and kidneys. Some patients can suffer from liver and kidney malfunction, resulting in the above symptoms due to the inability to eliminate toxic substances from the body.