If you’re going to hunt the high country in the western states, you should know about altitude sickness. Most altitude sickness cases are relatively harmless and result in shortness of breath and sluggishness. If you’re going above 8,000-10,000 feet, you could feel some altitude sickness. In its most common manifestation, a rapid ascent to high elevation can leave you in the tent feeling like you have a bad hangover, but eventually, it goes away as your body starts adapting to the lack of oxygen. However, it can get deadly if you develop High Altitude Pulmonary or Cerebral Edema. This is essentially where fluid begins building up in your lungs or brain. If your initial symptoms become worse, with a more severe headache, you lose coordination, your chest tightens, or you cough up fluid. If this happens, you need help, or it could become fatal. And, it doesn’t matter how physically fit you are, altitude sickness can still affect you. I know one guy who is tougher than woodpecker lips, very fit, and lives at a relatively high altitude who got Pulmonary Edema. He was barely able to walk out. The takeaway: don’t be too proud to pull the plug and get to the doctor if you need to.