How to Stay Safe From Altitude Sickness on Manaslu Trek?

Staying safe on the Manaslu circuit trek isn’t about how strong, healthy, and prepared you are. Altitude sickness in Manaslu can hit you out of the blue even if you acclimatize well, eat healthy foods, and work out regularly.

Even a small mistake like not pacing, sitting too long, or not layering properly can turn the situation very serious.

Treks like Manaslu Circuit, Serang Monastery, and Tsum Valley take trekkers through some of the highest passes in the world.

Crossing these high altitude passes presents several challenges, and altitude sickness is one of the worst and most common ones. 

In this article, we will discuss how to stay safe from altitude sickness during your trek in the Manaslu region.

Understanding Altitude Sickness

Altitude Sickness is a condition that can happen to anyone when they move to a higher altitude too quickly. At high altitude, the air is thin, which means breathing in the same amount of air gets you less oxygen than at a lower elevation.

Altitude sickness happens when the body has trouble adjusting to the difference in the amount of oxygen you are getting with each breath.

Altitude Sickness Types

There are three types of conditions, and two of them are life-threatening:

• Acute Mountain Sickness (AMS): It is the mildest and most common form of altitude sickness.
• High Altitude Pulmonary Edema (HAPE): It is a condition in which altitude sickness affects your lungs and fills them with fluid. It’s a medical emergency and requires immediate medical attention.
• High Altitude Cerebral Edema (HACE): It’s a critical condition and happens when altitude sickness causes swelling in your brain.

Altitude Sickness-Prone Zones in Manaslu Region

The following are the starting and ending points of treks:

• Risk starts from Chumling (2386 m/7825 ft) until we get back to Lokpa, when on the Tsum Valley Trek.
• Risk starts from Namrung (2630 m/ 8628 ft) until we reach Tilje on the Manaslu Circuit Trek.
• Risk starts from Bihi (2130 m/ 6988 ft) and remains until we reach Tilje (2300 m/ 7546 ft) on the Manaslu Circuit trek with Serang Monastery.

These are the altitude sickness-prone areas on each trek of the Manaslu region. We just have to be careful until we reach the starting point, and after that point, acclimate well and keep in mind the risk remains until we reach the ending point.

Importance of Proper Acclimatization

The acclimatization should be done properly to alleviate the risk of altitude sickness. 

In the Manaslu region, you reach above 4000 meters. Proper acclimatization helps your body adjust gradually to lower oxygen levels, reducing headaches, nausea, dizziness, and fatigue. 

Acclimatization supports physical performance, as climbing steep sections like the Larke La Pass at 5,106 meters becomes easier as your body slowly adapts, allowing better endurance and less breathlessness.

Also reduces the risk of severe altitude illness as high altitudes in Manaslu increase the risk of High-Altitude Pulmonary Edema (HAPE) and High Altitude Cerebral Edema (HACE).

Gradual acclimatization lowers these life-threatening risks. Sleep is the most important thing for stamina, and acclimatization is important as it improves sleep quality. Sleeping at higher altitudes without acclimatization can cause restless nights and shallow sleep. 

While acclimatizing, you take side trips like Pyungen Gompa hike and the Manaslu Base Camp trek, which enhance the overall trek experience and allow trekkers to explore the culture, monasteries, and different scenery. 

Supports hydration and nutrition absorption as your body metabolizes food and water better when acclimatized, reducing the risk of dehydration and energy loss during long trekking days.

Recognizing Early Warning Signs

Often, the first symptom is at higher altitudes (around 3,000-4,000 m in Tsum Valley or near Samagaon). A dull or throbbing headache that doesn’t improve with rest or mild painkillers is a red flag.

Do not wait until things get worse; these are the signs you should recognize early and act on.

• If you start feeling off above 2500 meters, you should stop immediately, take a rest, and consult with your guide.
• Excessive fatigue, like struggling with easy sections, means your body isn’t coping well with elevation. 
• Swelling, such as noticeable swelling in hands, feet, or face, can indicate fluid retention from early altitude stress. Watch for these near high camps like Samdo, Dharmashala, or near the Larke La pass.
• Subtle changes in mood or clarity, especially on remote trails like Serang Monastery, can signal early cerebral effects of altitude.

Things to Avoid During Trek

Small mistakes can grow fast here; what you avoid matters as much as what you do. The following things should be avoided:

• Avoid Rapid Altitude Gain: Skipping acclimatization days at places like Samagaon or Chumling increases the risk of altitude sickness. Climbing slowly is very important in Manaslu, as rapid altitude gain can make you sick.
• Avoid alcohol and smoking: Drinking alcohol in high altitudes disturbs sleep, increases dehydration, and reduces oxygen absorption, which raises the risk of altitude sickness. Smoking restricts oxygen intake, worsens breathlessness, and increases fatigue, especially above 3500 meters.
• Avoid Ignoring Early Symptoms: Headache, nausea, dizziness, or loss of appetite should never be brushed off, especially above 3000 m. Always listen to your body.
• Don’t push yourself too hard: You might have to walk for a longer duration on uphill terrain, which drains energy very quickly. Avoid pushing yourself too hard if you don’t feel well, as it worsens altitude stress.
• Poor hydration: At high altitude, you don’t feel thirsty that much. It’s very important that you keep yourself hydrated, as poor hydration worsens sleep and oxygen absorption.
• Avoid skipping meals: The foods are very basic in the Manaslu region, and appetite loss is common at altitude, but proper nutrition is essential for strength and recovery.
• Avoid underestimating weather: In high altitude, weather changes happen in the blink of an eye. Sudden snow or wind near the Larke La Pass can be very risky.
• Avoid Overloading your backpack: Heavy loads increase exhaustion on steep sections like Samdo to Dharamsala and reduce energy reserves needed at altitude.

How is altitude sickness treated when you are in the Manaslu region?

The trekking route in the Manaslu region includes high passes, difficult terrain, and unpredictable weather conditions. You must know how to treat or at least provide first aid for altitude sickness.

• Immediate stop in ascent: At the first signs of altitude sickness, like headache, nausea, dizziness, the trekker must stop walking or gaining altitude. Continuing higher can push your health into serious conditions.
• Rest and Observation: Mild symptoms are often managed by resting for 24 hours at the same altitude. If symptoms still occur, then it’s time to take action.  
• Hydration and warmth: While suffering from altitude sickness, feeding warm soups and lukewarm water provides relief. Keep the ill person as warm as you can because dehydration and cold worsen symptoms.

Local Health Posts on Manaslu treks

In different trekking the trails of the Manaslu region, there are health posts located to help ill trekkers:

• Tsum Valley Trek: Chhekamparo has a simple health post that provides first aid, oxygen support, and assessment.
• Manaslu Circuit: Philim, Namrung, Samagaon, and Samdo have small health posts that assist in providing basic treatment and monitoring.
• Samagaon: The most reliable medical support on the Manaslu Circuit, including basic diagnosis and oxygen if needed.

• Medication: Guides have a first aid kit and carry altitude-related medications, but they are used only as support, not as a replacement for rest or descent.

Immediate Descent in Case of Severe Symptoms: In severe conditions, such as when symptoms worsen, disorientation and confusion, severe breathlessness, loss of coordination, the ill person should be immediately descended, as it is the most effective treatment.

Serang Monastery Trek Consideration: Since Serang Monastery is a day hike with return to a lower altitude, treatment focuses on early descent the same day if symptoms appear. An overnight stay is avoided if anyone feels unwell.

Emergency Response Plan

When altitude sickness takes a serious turn, you should take emergency steps. Here’s how:

• Do not allow the ill person to continue walking to a higher elevation because it can be fatal. Provide immediate rest, medication, and warmth.
• Recognize the symptoms, such as when an ill person walks wobbly, looks confused, experiences severe breathlessness at rest, feels chest tightness, has blue lips, experiences continuous vomiting, or becomes unconscious. These may indicate HACE or HAPE; transfer to the nearest medical facility immediately.
• An immediate descent of at least 500-100 meters is the most effective treatment. From high elevation villages to lower regions like Samagaon or Chhekamparo. Descent should not wait until morning if symptoms are severe.
• Provide supplemental oxygen, your guides, and some lodges or health posts that have it. This action stabilizes the trekker but does not replace the descent.
• Prevent hypothermia and keep the person warm and rested. Use down jackets, sleeping bags, and warm drinks. Coldness worsens the condition.
• Guides usually have first aid kits and administer emergency medication according to the guide’s advice. But it is supportive only. Descent remains the priority. 
• If the health condition looks unmanageable, use a satellite phone or local communication to arrange a helicopter evacuation.
• Serang Monastery trek protocol, since this is a day of excursion, descend back to the base village immediately if symptoms start. No overnight stay at a higher elevation.
• In the Manaslu region, Emergency response is simple in principle: Stop, Support, Descend, Evacuate if needed. Delaying or thinking too much are the biggest dangers.

Tips for Safe Trek

Safety here comes from small, consistent actions each day: Here are some major safety tips for Manaslu Circuit Trek:

• Always keep in mind to ascend gradually without rushing. Follow a slow itinerary with acclimatization stops at places like Namrung, Chumling, Samagaon, and Samdo.
• Listen to your body; if headache, nausea, or dizziness are signals to rest, not to push forward.
• In high elevations, you don’t feel the thirst that much. Remember to stay hydrated by drinking 3-4 liters of water daily. Use purification tablets or a filter.
• Eat a proper meal, and even with low appetite, eat soups, rice, potatoes, and warm food for energy.
• Start early in the morning as it offers clearer weather, which is very important while crossing the Larke La Pass.
• Dress in layers as temperatures change quickly.
• Carrying essential gear like a down jacket, gloves, sun protection, a headlamp, and a basic first aid kit is a must-have.
• Maintain hygiene by properly washing hands, using sanitizer, and avoiding untreated water to prevent stomach illness.
• Inform your guide or group immediately if you feel unwell. Keep communication ready.
• The sun is very strong at high altitude, make sure you use sunglasses, sunscreen, and a hat. 
• Carry a first aid kit with different altitude medicines, bandages, and ointments.

Author

Bryan Bk

Bryan BK is a storyteller at heart and an adventurer by soul. As a passionate writer and traveler, he finds inspiration in the places he visits and the people he meets. Through his words, he brings destinations to life, sharing experiences that inspire others to explore, dream, and discover.