Quick Answer
Altitude sickness on Kilimanjaro occurs when the body struggles to adapt to lower oxygen levels at high elevation. Common symptoms include headache, nausea, fatigue, and dizziness. It can be prevented by climbing slowly, staying hydrated, choosing longer routes, and following proper acclimatization strategies.
Introduction
Climbing Mount Kilimanjaro is an incredible experience — but altitude sickness is the biggest risk every climber faces.
At 5,895 meters (19,341 ft), oxygen levels drop significantly, and even experienced trekkers can be affected.
This guide covers everything you need to know about:
- Symptoms
- Causes
- Prevention strategies
- Safety measures
So you can climb safely and successfully.
Altitude sickness, also known as Acute Mountain Sickness (AMS), happens when your body cannot adjust to reduced oxygen levels at high altitude.
Why it happens on Kilimanjaro:
- Rapid ascent
- High summit elevation (5,895m)
- Less time for acclimatization
👉 Important: Even fit and experienced hikers can get altitude sickness.
Symptoms of Altitude Sickness on Kilimanjaro
Early / Mild Symptoms
- Headache
- Nausea
- Dizziness
- Fatigue
- Loss of appetite
- Trouble sleeping
Moderate Symptoms
- Persistent headache
- Vomiting
- Difficulty walking straight
- Extreme fatigue
Severe Symptoms (Emergency 🚨)
- Confusion
- Breathlessness at rest
- Chest tightness
- Blue lips or fingernails
- Inability to walk
👉 Severe symptoms require immediate descent.
Types of Altitude Sickness
1. AMS (Acute Mountain Sickness)
- Most common
- Usually mild
- Treatable with rest & hydration
2. HAPE (High Altitude Pulmonary Edema)
- Fluid in lungs
- Life-threatening
3. HACE (High Altitude Cerebral Edema)
- Fluid in brain
- Rare but fatal if untreated
👉 Professional guides are trained to detect all stages early.
Why Altitude Sickness Is Common on Kilimanjaro
Kilimanjaro is unique because:
- Climbers ascend quickly
- No long pre-acclimatization phase
- Many choose short itineraries
👉 Faster climbs = higher risk
Best Routes for Acclimatization
Best (High Success Rates)
- Northern Circuit (~95%)
- Lemosho Route (~90%)
Good
- Machame Route (~85%)
- Rongai Route (~85%)
Lower Success
- Marangu Route (~80%)
- Umbwe Route (60–70%) ❌
👉 Longer routes = safer climbs
How to Prevent Altitude Sickness
1. Climb Slowly (Pole Pole)
Your guide sets a slow pace to help adaptation.
2. Stay Hydrated
- Drink 3–4 liters daily
- Prevents symptom worsening
3. Choose Longer Routes
More days = better acclimatization
4. Eat Properly
Even with low appetite, keep eating
5. Take Acclimatization Days
Reduces AMS risk significantly
6. Consider Diamox
- Helps adaptation
- Consult your doctor first
7. Follow “Climb High, Sleep Low”
Improves oxygen adaptation
Safety Measures by Kilimanjaro Climbing Clu
Professional support plays a huge role in safety.
Your guides provide:
- Oxygen saturation checks (twice daily)
- Pulse and heart rate monitoring
- Health condition assessments
- Emergency oxygen support
- Immediate descent protocols
- Evacuation coordination
👉 Safety always comes before summit.
What To Do If You Get Altitude Sickness
Mild Symptoms
- Rest
- Drink water
- Eat properly
- Slow your pace
Moderate Symptoms
- Stop ascending
- Monitor condition
- Descend if no improvement
Severe Symptoms
🚨 Immediate descent required
🚨 Medical emergency
Final Thoughts
Altitude sickness is the biggest challenge on Kilimanjaro — but it is manageable.
With:
- Proper pacing
- Right route
- Good hydration
- Professional guidance
👉 You can climb safely and reach the summit successfully.
English 
Dutch 
French 
Czech 
Spanish 
German 
Polish 
Italian 
Chinese 
Russian