Heatstroke vs Heat Exhaustion: What Every Outdoor Worker and Summer Traveller Needs to Know
Heatstroke and heat exhaustion are not the same thing. One you treat at home, one needs an ambulance. Here is how to tell them apart and act fast.
You know this week if you live and work in the South Bay. The headache started Tuesday afternoon. Your eyes felt gritty by Wednesday. By Thursday you couldn't tell whether your stuffy nose was allergies, the office AC, or the dry air in your apartment. You finished standups, you cleared your PR review, you went to bed at 11:30 wondering whether to call your doctor.
Late May is the hardest stretch of this in the South Bay. Three things stack on each other in San Jose, Sunnyvale, Mountain View, and Cupertino.
Pollen. Oak pollen tails off but grass pollen ramps up. Bermuda, fescue, and rye drive symptoms across the South Bay through May into June.
Screens. The average tech worker spends nine to eleven hours a day at displays. Multiple monitors. Phone. Tablet. Often in dry, air-conditioned indoor air.
Air quality. Fire season hasn't started, but it's coming. The South Bay has had recent summers where AQI from inland wildfire smoke made even short outdoor exposures uncomfortable. People stayed indoors more, which meant more screen time and more recirculated air.
The headache + eye irritation + congestion combo can come from at least four sources at once. Sorting it out alone is hard.
This is general information, not medical advice. If you have severe symptoms (sudden vision changes, the worst headache of your life, persistent fever), get medical care.
The American Optometric Association calls it computer vision syndrome. You might just call it Wednesday afternoon.
Symptom fingerprint:
Screen focus drops your blink rate, sometimes by half. Less blinking means a less stable tear film, so the eye surface dries out. Holding the same focal distance for hours fatigues your focusing muscles.
Try these:
If your symptoms persist through all of that, see an optometrist. A low-power prescription change or computer glasses can help, and an exam rules out other causes.
Symptom fingerprint:
Try these:
"Sinus headache" is the most over-diagnosed headache type. Most headaches that feel like sinus headaches are tension headaches or migraines wearing a disguise.
Tension headache fingerprint:
Migraine fingerprint:
True sinus headache fingerprint:
If your "sinus headaches" come without thick discolored discharge and don't improve once allergies are under control, they probably aren't sinus headaches.
Indoor air in the Bay Area drives more symptoms than people realize, even before fire season starts.
Things worth knowing:
If you do nothing else from this article, do these five things:
Most South Bay tech-worker symptom clusters resolve with the changes above. Signals that warrant a professional:
Eyes, head, sinuses, fatigue, all overlapping. Reddit threads from Sunnyvale show people spending weeks chasing one cause while the real driver was something else.
Symplicured is a free AI symptom checker for this kind of multi-symptom puzzle. Describe what you feel in plain language. Get a structured read on what your symptoms might mean and whether you need care. Start your assessment at symplicured.com/chat.
Heatstroke and heat exhaustion are not the same thing. One you treat at home, one needs an ambulance. Here is how to tell them apart and act fast.
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