25 Surprising Ways Stress Affects Your Health
"Fight or flight" chemicals like adrenaline (epinephrine) and cortisol can cause vascular changes that leave you with a tension headache or migraine, either during the stress or in the "let-down" period afterwards.
Stress also makes your muscles tense, which can make the pain of a migraine worse. Beyond treating the headache itself, focus on headache-proofing your home, diet, and lifestyle in general.
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