Why does my head have pressure & I feel dizzy nauseous? Help?

Anonymous

it happened yesterday as I went to work few hours without eating. But today I did eat before work and I only worked 4 hours & I felt nauseous & have strong pressure feeling in my head. I felt so nauseous that I felt sick & weak & that I was gunna vomit right that second. Why? I ate and still feel weird pressure in my head

Why does my head have pressure & I feel dizzy nauseous? Help?
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