Headache when the weather changes may be related to physiological factors, or migraine, hypertension and other causes. 1. Physiological factors: When the weather suddenly becomes cold, blood vessels will reflexively contract when stimulated, resulting in slower blood circulation and insufficient blood supply to brain tissues, which may cause headaches and may be accompanied by dizziness and weakness. 2. Migraine: If there is a history of migraine, when the weather changes, it is likely to trigger a migraine attack, which will cause headaches, mainly manifested as throbbing pain symptoms, may also be accompanied by dizziness, nausea, photophobia, photophobia and other symptoms. 3. Hypertension: when the weather changes, the cold stimulation, is likely to lead to vasospasm, resulting in increased blood pressure fluctuations, resulting in increased pressure on the blood vessels in the brain, may cause headaches, may be accompanied by dizziness, nausea and other uncomfortable symptoms. A change in the weather will headache, but also for other reasons, if the headache symptoms never get better, it is recommended to seek medical advice as soon as possible, to give targeted treatment.