There are several kinds of headaches that need to be paid attention to: 1.Sudden and serious headache that has not been experienced before, this kind of headache must be paid attention to whether there is cerebral hemorrhage or other cerebrovascular diseases; 2.Progressively aggravated headache, that is, the headache occurred recently, but not before, and it is getting worse day by day; 3.Headache in tumor patients, the tumor can metastasize to the whole body and also to the brain. Therefore, the headache of tumor patients should always be alert; 4. Headache of patients with autoimmune diseases, such as AIDS. Because of the poor resistance of these patients, they are prone to bacterial, viral and even fungal infections. If these patients have headache, they need to pay attention to fungal meningitis; 5. If headache is accompanied by fever or convulsion, it may be due to intracerebral lesions, so they should seek medical attention in time.