Headache is a common clinical symptom, but there are various diseases that cause headache. Brain tumor is one of the common brain diseases and one of its common symptoms is headache, so some people always worry if they have brain tumor after having headache. However, headache is not the same as brain tumor. On one hand, having headache does not mean having brain tumor, many other diseases can also cause headache; on the other hand, brain tumor does not necessarily manifest as headache, many brain tumors do not have obvious headache symptoms. However, headache is a common symptom of brain tumor, and there are some cases of headache that need to be alerted to brain tumor. In the process of brain tumor growth, the size of brain tumor increases gradually, and the headache symptoms caused by brain tumor also vary from none to mild to severe, and this process can vary from several years to several months or even weeks according to the speed of tumor growth. If the tumor grows suddenly or the tumor volume exceeds the compensatory limit of human body, it can also show that the symptoms are not obvious in the early stage, but suddenly the headache symptoms are significantly aggravated in several days. In general, most of the headaches caused by brain tumors appear within a certain period of time, and then slowly worsen, from intermittent headaches to persistent headaches, from mild headaches to severe headaches. Moreover, the headache caused by brain tumor is due to the increase of intracranial pressure, which is often obvious in the latter half of the night or early morning, and it has the characteristic of aggravating with the action of increasing intracranial pressure such as holding breath, defecating, coughing and exertion. In addition to headache symptoms, brain tumor will also compress or invade other brain tissues or nerves to cause corresponding symptoms, that is, headache of brain tumor is often accompanied by other neurological symptoms. For example, in addition to headache, the increased intracranial pressure caused by brain tumor is often accompanied by nausea and vomiting, vision loss and other symptoms. Tumor compression or invasion of corresponding brain tissues may also cause epilepsy, reduced strength of limb movement, speech impairment, personality change, numbness of limbs, unstable walking and other symptoms. Tumor compression on brain nerve may also cause neurological symptoms such as loss of smell, double vision, facial numbness, tinnitus or hearing loss, difficulty in swallowing or choking. Although these concomitant symptoms often appear at the same time with headache, although the specific location of brain tumor in the brain varies, the corresponding concomitant symptoms also vary, and these concomitant symptoms do not all appear at the same time, but usually one or several of them. In some cases, there may be only headache without any obvious concomitant symptoms. However, headache and accompanying neurological symptoms are not unique to brain tumors, as many other brain diseases can also present with similar headache and accompanying symptoms. Although headache and other symptoms are common manifestations of brain tumor, these symptoms alone cannot diagnose brain tumor. If you suspect brain tumor, you can go to a specialized cancer hospital for head CT or MRI scan, which in most cases can quickly diagnose whether there is a brain tumor and the general type and nature of brain tumor.