What are the symptoms of altitude sickness on Mt. Rinjani?

Altitude sickness symptoms on Mount Rinjani typically start with a headache, which is the most common early sign. You might also feel unusually tired, nauseous, or dizzy. Some trekkers experience loss of appetite, difficulty sleeping, or a general sense of feeling unwell that they can’t quite explain.

Shortness of breath during normal activity is also common, though at Rinjani’s elevation this is often just the normal effect of thinner air rather than true altitude sickness. The key is whether the symptoms are getting worse or interfering with your ability to continue. Mild symptoms are fairly common on Rinjani and usually resolve with rest, hydration, and a slower pace.

Our guides at Lombok-Indonesia.org see this regularly and know how to manage it. They’ll encourage you to drink more water than you think you need, eat even if you don’t feel hungry, and take breaks at a pace that lets your body adjust. The 3D2N package helps because the extra day gives your body more time to acclimatize compared to the rushed 2D1N itinerary.

More serious symptoms are rare at 3,726 meters but worth knowing. These include severe headache that doesn’t respond to painkillers, vomiting, confusion, difficulty walking straight, or fluid in the lungs that causes a persistent cough.

If any of these appear, the treatment is immediate descent, and our guides are trained to recognize them and act quickly. The good news is that because Rinjani isn’t extremely high, descent almost always resolves symptoms within hours.