What is the primary treatment for relieving mild acute mountain sickness (AMS)?

The primary treatment for relieving mild acute mountain sickness (AMS) is to move the patient to a lower altitude. This method addresses the root cause of AMS, which results from reduced oxygen levels at higher elevations. By descending to a lower altitude, the partial pressure of oxygen increases, allowing for improved oxygenation and alleviating symptoms associated with AMS, such as headache, nausea, and fatigue.

While other options like aggressive rehydration or high-flow oxygen may provide some symptomatic relief, they do not address the underlying issue of low oxygen availability at high altitudes. Analgesics may help relieve headache symptoms but are not a definitive treatment for the condition itself. Descending to a lower altitude is the most effective and immediate solution in managing mild AMS.