Altitude Sickness: What It Is, How to Spot It, and How to Beat It
If you’ve ever felt dizzy, shaky, or nauseous on a mountain hike, you’ve probably experienced altitude sickness. It hits most people when they climb faster than the body can adjust to lower oxygen levels. The good news? Knowing the signs, taking a few simple steps, and having a plan can keep you safe and let you enjoy the view.
Common Symptoms and When to Worry
Altitude sickness usually shows up 6‑24 hours after gaining elevation. The classic trio is headache, nausea, and trouble sleeping. You might also notice shortness of breath, fatigue, or a loss of appetite. Light‑headedness or a pounding heart are red‑flag signs that your body is struggling.
If symptoms worsen after a day at the same altitude—especially if you get a severe headache, vomiting, confusion, or a rapid heartbeat—it could be progressing to high‑altitude cerebral edema (HACE) or high‑altitude pulmonary edema (HAPE). These are medical emergencies. In those cases, descend immediately and seek professional help.
Preventing and Managing Altitude Sickness
The smartest move is a gradual ascent. Aim for no more than 1,000 feet (300 m) of sleeping elevation gain per day once you’re above 8,000 feet (2,400 m). If you have to climb higher, take a rest day for every 2,000 feet (600 m) you add.
Stay hydrated, but avoid alcohol and high‑caffeine drinks—they can dehydrate you and worsen symptoms. Light, high‑carb meals give your body the energy it needs to adapt. If you feel a mild headache or light nausea, stop, rest, and drink water. Over‑the‑counter pain relievers like ibuprofen can help, but always follow dosage guidelines.
For many trekkers, a low dose of acetazolamide (Diamox) before the climb can speed up acclimatization. Talk to a doctor beforehand, especially if you have kidney issues or are pregnant. In severe cases, prescription medications like dexamethasone may be required, but only under medical supervision.
Keep an eye on the weather. Cold, windy conditions increase breathing effort, making altitude sickness more likely. Dress in layers, protect your face from wind, and move at a comfortable pace. If symptoms appear, the rule of thumb is “climb high, sleep low.” Stay at a lower campsite, hydrate, and give your body time to adjust before pushing higher.
Finally, pack a basic emergency kit: a portable oxygen canister (if allowed), a whistle, and a thermal blanket. Knowing how to use these tools can be a lifesaver if you need to descend quickly.
Altitude sickness is frustrating but rarely fatal when you respect your body’s limits. Use these practical tips, listen to your symptoms, and you’ll stay healthy while reaching those breathtaking peaks.
The Impact of High Altitude on Deep Vein Thrombosis Risk
Hey, it's not every day we talk about this, but it's worth knowing: high altitude can impact your risk of Deep Vein Thrombosis (DVT). It's crazy, right? But as we journey further and higher, our bodies must adapt – which isn't always easy. This piece will dive into how high altitudes can elevate the risk of DVT, a condition where blood clots form, usually in the legs. We'll also explore how to effectively prevent it. So if heights, hikes, or travels are your jam, this is a must-read.