Treating a headache caused by altitude sickness

A usual non-prescription pain reliever may reduce discomfort for some people, but relief does not prove acclimatisation or make continued ascent safe.

Headache after gaining altitude can be part of acute mountain sickness, particularly when nausea, dizziness, fatigue, poor appetite, or disturbed sleep appears alongside it. Reduced oxygen availability and the body's early adaptation contribute to symptoms.

Not every headache at altitude has the same cause. Dehydration, missed caffeine, sun exposure, migraine, infection, and muscle tension can overlap. The safe response still includes pausing ascent while checking the timing, associated symptoms, fluid intake, and response to rest.

Rest at the current altitude, reduce physical effort, eat if able, stay warm, and drink to thirst. Avoid alcohol and sedatives because they can affect breathing, judgement, and symptom monitoring. Do not climb higher until the headache and any accompanying symptoms have resolved.

Before taking a pain reliever, follow the label and check suitability if you have kidney or liver disease, stomach ulcers, take blood thinners, are pregnant, or have reacted to pain medicines before. Avoid combining products that contain the same active ingredient.

Descend urgently and seek emergency help if headache becomes severe or is accompanied by confusion, abnormal behaviour, unusual sleepiness, repeated vomiting, inability to walk steadily, weakness, breathlessness at rest, or coughing frothy fluid. The affected person should not travel alone.

Prompt assessment is warranted when pain continues after descent, starts suddenly with unusual intensity, follows a head injury, comes with fever or neck stiffness, or differs markedly from your familiar headache pattern. Those features can point to causes other than uncomplicated altitude sickness.

Describe where the headache started, the ascent schedule, other symptoms, and what you took for pain. Ask how to distinguish your usual migraine or tension headache from altitude illness and which medicine is compatible with your health conditions.

Discuss a slower sleeping-altitude schedule and a clear turnaround plan, including who will help if your judgement or balance becomes impaired.