Which of the following is a symptom of altitude sickness?

• A. Nausea
• B. Rash
• C. Fever
• D. Cough

Answer: (A)

Altitude sickness shows up when you move to high elevations where there’s less oxygen, and the body starts to react with signs like nausea. The nausea comes from the way reduced oxygen affects how your stomach and brain function as you try to adjust, making queasiness a common early symptom along with headaches and dizziness. The other options—rash, fever, and cough—aren’t typical early signs of altitude sickness; they’re usually linked to allergic reactions, infections, or respiratory illnesses. If symptoms do occur and are mild, rest and fluids can help, but if nausea is present with worsening headache, dizziness, or shortness of breath, it’s important to descend to a lower altitude and seek help.