Exposure to flickering lights or sitting in front computer screens for long time can trigger a migraine. Even a brief exposure to sunlight can cause a migraine headache in some cases. Also, in case a person is already sleep deprived or dehydrated or is suffering from low blood pressure, bright light can act as a secondary form of migraine. The best advice is to wear a hat and a sunglass while stepping out in the sunlight. Or, one should also avoid going to sunny places and should get more sleep.
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