Acute Mountain Sickness – High Altitude Trekking

Traveling is synonymous with adventure and excitement, and trekking in Nepal to higher altitudes is no exception.

When you’re standing and walking thousands of meters or feet above sea level, it can feel like you’re just a few more steps from heaven. The views are breathtaking, the sense of accomplishment is unparalleled and the connection with nature is profound.

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However, the thrill of high altitude trekking comes with a significant challenge: the risk of altitude sickness.

Understanding Acute Mountain Sickness (AMS) is crucial before you embark on your adventure in Nepal.

What is High Altitude Sickness?

High altitude sickness, also known as AMS, refers to a group of symptoms that can affect anyone who ascends too rapidly to high altitudes, where the air is thinner and oxygen levels are lower.

These symptoms can range from mild discomfort to life threatening conditions, potentially slowing down or even preventing trekkers from reaching their dream destinations.

AMS can affect anyone, regardless of age, gender or physical fitness, and it’s unpredictable. One trekker may feel fine while another in the same group struggles.

Understanding the nature of AMS, how it manifests, and what to do about it is key to a safe and enjoyable trek.

Why Does Altitude Sickness Occur?

As the altitude increases during your trek, the oxygen levels in the air decrease. At sea level, the oxygen concentration is about 21%, but at 5,000 meters (about 16,404 feet), the oxygen concentration is significantly lower, and each breath delivers less oxygen to your lungs. This lack of oxygen can lead to various physiological challenges as your body struggles to adjust to the thinner air.

Your body may start to show altitude related symptoms such as difficulty breathing, dizziness, fatigue, headache, loss of appetite, nausea, rapid pulse and shortness of breath.

These symptoms are common as you ascend further on high altitude trekking routes. However, they don’t have to mark the end of your adventurous journey.

Altitude sickness is real, but it doesn’t have to stop you. Join our trek and explore the Himalayas with peace of mind.

Types of Altitude Sickness

1. Acute Mountain Sickness (AMS)

The most common form of altitude sickness, AMS typically presents with symptoms like headaches, nausea, dizziness and difficulty sleeping. These symptoms are often mild but can worsen if ignored.

2. High Altitude Cerebral Edema (HACE)

A severe and potentially life threatening condition where the brain swells due to fluid leakage. Symptoms include confusion, inability to walk straight, hallucinations and loss of consciousness. Immediate descent and medical attention are crucial.

3. High Altitude Pulmonary Edema (HAPE)

Another severe condition, HAPE occurs when fluid accumulates in the lungs, making it difficult to breathe. Symptoms include a persistent cough, frothy sputum, chest tightness and extreme fatigue. Like HACE, HAPE requires immediate descent and emergency medical care.

How to Prevent Acute Mountain Sickness – High Altitude Trekking

1. Know the symptoms.

Prevention starts with awareness. Understand the symptoms of altitude sickness so you can take immediate action if needed. Recognizing early signs such as headaches, nausea, and dizziness allows you to take steps before the condition worsens.

In addition to AMS, it’s vital to be aware of the signs of HACE and HAPE. These more severe conditions require prompt attention and can escalate quickly. Don’t hesitate to inform your guide or seek help at the first sign of these symptoms.

2. Keep yourself hydrated.

Proper hydration is essential for maintaining your health and stamina at high altitudes. Dehydration can exacerbate symptoms of altitude sickness, so start drinking plenty of water even before you begin your trek and continue to do so throughout your journey.

Aim to drink at least 3 liters of water daily, increasing as you gain altitude. Avoid caffeinated drinks and alcohol, as these can contribute to dehydration.

3. Take your time in ascending.

Trekking is not a race, it’s an experience. The best way to acclimatize as you ascend is to take it slow.

Rapid ascents can trigger AMS, so after reaching 8,000 feet, limit your altitude gain to 1,000 feet per day and spend the night at that altitude to help your body adjust.

On the Everest Base Camp Trek, for instance, we plan acclimatization days at Namche Bazaar and Dingboche to prepare your body for the higher altitudes ahead. These rest days are crucial for letting your body adjust to the reduced oxygen levels.

4. Sleep at lower altitude.

It might seem counterintuitive, but descending to a lower altitude to sleep can help your body acclimatize better, preparing you for the next day’s trek. This “climb high, sleep low” strategy is widely recommended and has been proven effective in preventing AMS.

For example, after trekking to a higher elevation during the day, you might descend a few hundred meters to sleep. This helps your body recover and prepares you for further ascents.

5. Wait out the symptoms.

Don’t rush to ascend if you start feeling the symptoms of high altitude sickness. Rest and allow your body to adjust before continuing.

If symptoms don’t improve or worsen within 12 hours, it’s critical to descend immediately and acclimatize properly before attempting to continue.

Ignoring symptoms or pushing through can lead to severe conditions like HACE or HAPE. Your safety should always take priority over reaching a specific altitude.

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6. Carry medications.

Mild altitude sickness can be managed with medication. Our guides carry essential medications like acetazolamide (Diamox) to help reduce symptoms, but we recommend keeping your own supply as well.

Ibuprofen can relieve headaches, and acetazolamide can help speed up acclimatization. Dexamethasone, a corticosteroid, is used in more severe cases and can reduce swelling in the brain (HACE) or lungs (HAPE).

These medications are commonly used for high altitude treks like Everest Base Camp or Mount Kilimanjaro, and it’s wise to consult your doctor about them before your trip.

7. Avoid coffee and alcohol before and during the trek.

Both coffee and alcohol can cause dehydration, which impedes proper acclimatization. Additionally, alcohol and other depressant drugs can reduce respiratory function and worsen AMS symptoms.

Stick to water, herbal teas and electrolyte solutions to keep hydrated.

8. Consult your doctor before trekking.

Certain pre existing conditions can make high altitude trekking more challenging. Consult your doctor and discuss your trekking plans to get personalized medical advice.

Conditions like asthma, high blood pressure or heart disease can be exacerbated by high altitude, so getting a medical check up before your trek is essential.

It’s advisable to avoid high altitude trekking if you are pregnant, as the reduced oxygen levels can pose risks to both mother and baby.

9. Eat right.

Carbohydrates are known to improve energy levels and performance at high altitudes, helping to alleviate symptoms of AMS. Consume plenty of carbohydrate rich foods like bread, pasta and potatoes before and during your trek.

Eating a balanced diet also helps maintain your overall health and energy levels, which is crucial when your body is under the stress of high altitude mountaineering trip in Nepal.

10. Make sure that everyone is properly acclimatized.

Acclimatization rates vary from person to person. Ensure everyone in your group has properly acclimatized before moving to higher altitudes.

If anyone exhibits signs of altitude sickness, inform your guide immediately. Don’t move up until everyone is fit to continue.

Group dynamics are important on treks, especially at high altitudes. Keeping the group together and ensuring everyone is healthy contributes to a safer and more enjoyable experience for all.

Additional Tips for a Safe Trek

• Use oxygen monitors: Consider carrying a portable pulse oximeter to monitor your blood oxygen levels during the trek. This can give you an early warning if your oxygen saturation drops too low.
• Get travel insurance: Ensure that your travel insurance covers high altitude trekking and emergency evacuation. In case of severe AMS, an immediate evacuation might be necessary and having insurance can provide peace of mind.
• Acclimatization exercises: Engage in light physical activities during your rest days. This helps your body adjust without overexerting yourself.

Summary

At Mosaic Adventure, your safety and well being are our top priorities.

Altitude sickness often begins with mild symptoms but can become life threatening if not properly managed. Awareness, preparation and caution are your best tools for preventing AMS.

Our experienced guides are trained to recognize the signs of altitude sickness and will take all necessary steps to keep you safe. However, your vigilance is equally important. If you experience the first signs of AMS, notify our guides without delay.

Remember, the goal of your trek is not just to reach the destination, but to enjoy the journey and return home safely.

Don’t just dream about the Himalayas – experience them. Your safety is our priority. Sign up for a trek with Mosaic Adventure and explore Nepal confidently.