Mountain Sickness Topic Guide
Altitude Sickness (Mountain Sickness): Altitude sickness (mountain sickness) is caused when a person's body is not able to adjust to a higher altitude. Acute altitude sickness symptoms fatigue, headache, dizziness, insomnia, nausea, decreased appetite, edema, and social withdrawal. Most cases of altitude sickness are resolved by going to a lower altitude. Altitude sickness can be severe and life-threatening if it progresses to high altitude pulmonary edema (HAPE).
Foreign Travel It is important to plan well in advance when traveling to a foreign country. Travelers should protect (and prepare) themselves from illness by obtaining the appropriate vaccinations and bringing along a traveler's medical kit that contains prescription medications, first aid supplies, sanitary napkins/tampons (for women), sunscreen, insect repellents, motion sickness medication, pain remedies, cold remedies, and foot care products, among other items.
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