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Only half of high altitude pulmonary edema (HAPE) victims show early signs of altitude sickness, so its onset might come as a surprise. Symptoms usually appear on the second night at altitude so be on alert, and descend immediately to stop them.
>> Early signs Dry cough, reduced performance, shortness of breath (while moving and at rest)
>> Later symptoms Gurgling noises when breathing, cough that pro- duces phlegm (frothy sputum is often bloody and pink), chest pain, and increased heart rate and respiration
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