Oxygen therapy is an effective treatment for acute mountain sickness because it directly increases the amount of oxygen available to the body at high altitudes. Supplemental oxygen helps reverse hypoxia, easing symptoms such as headache, dizziness, fatigue, and shortness of breath. It can be delivered through portable oxygen tanks or concentrators, especially in remote or high-altitude settings. Even brief periods of oxygen use can provide significant relief and stabilize patients until descent or acclimatization occurs. Oxygen therapy is also essential in managing severe forms like high-altitude cerebral or pulmonary edema.