Severe headache may be related to lack of sleep, or it may be caused by high blood pressure, migraine, brain lesions, etc. It may also be accompanied by dizziness, nausea and other symptoms. If the symptoms persist, you should go to the hospital in time to clarify the cause.1. Lack of sleep: Due to excessive late nights in the near future, resulting in lack of sleep, the brain is in a state of fatigue for a long time, resulting in brain nerve dysfunction, which may cause severe headaches, accompanied by sleepiness, poor mental state and other performance. For this situation, we should pay more attention to rest, work and rest, and sleep, and when there is enough sleep, it will help to relieve the symptoms of severe headache; 2. Hypertension: especially for people with a history of hypertension, because they fail to take antihypertensive drugs on time, or do not reasonably control their emotions, resulting in excessive emotional excitement, it is likely to cause a sharp rise in blood pressure, resulting in an increase in pressure inside the cerebral vessels, which can cause stimulation of the meninges. The brain membrane will be stimulated, causing severe headaches and, in severe cases, nausea and vomiting. Mainly the application of antihypertensive drugs such as Irbesartan and Nifedipine, when the blood pressure control is stable, it is conducive to the relief of the above symptoms, usually pay attention to the regulation of emotions, to ensure a happy mood, avoid too much excitement; 3. Migraine: the disease has more causes, if there is a history of migraine, by environmental factors, emotional factors or dietary factors, such as bad, also triggered migraine attacks, when migraine attacks, can appear severe headache symptoms, i.e., severe headache, which may also be accompanied by nausea, vomiting, photophobia and phonophobia. If the headache is more serious, it is necessary to apply zolmitriptan, sumatriptan succinate and other triton drugs, and for patients with recurrent migraine, it is necessary to apply aspirin, flunarizine hydrochloride and other preventive drugs; 4. For example, brain tumor, due to the stimulation and compression of local brain tissues by tumor, resulting in increased intracranial pressure, can cause severe headache symptoms, and can also be accompanied by vomiting and other manifestations. When the intracranial pressure increases, mannitol, glycerol and fructose should be applied in time to lower the intracranial pressure, and if necessary, surgical resection should be performed as soon as possible. In addition, severe headache may also be related to hangover and staying up late, because a large intake of alcohol in a short period of time causes the body’s central nervous function to begin to appear disordered, resulting in behavior, consciousness, and headache. Usually it can be relieved after rest. If the discomfort is severe or persistent after drinking alcohol, you need to seek medical attention and follow medical advice for rehydration treatment.