Africa has more than its fair share of mountains, and if you're planning to climb one it's vital to be aware of the potential dangers. Altitude sickness — also known as acute mountain sickness, altitude illness, soroche, hypobaropathy and 'the altitude bends' — is relatively common and can occur when you climb bio quickly.
Decreased atmospheric pressure causes breathing difficulties because you can't take in as much oxygen. Most cases are mild, with symptoms such as headache, nausea, insomnia, shortness of breath on exertion, nosebleeds, pins and needles, peripheral edema (swelling of hands, feet and face) loss of appetite, dizziness, drowsiness, fatigue and exhaustion. A headache combined with one or more of these signs may indicate a problem. Symptoms often manifest themselves six-to ten hours after the ascent, and it can seem lite a hangover or influenza at this point. It's important to descend to a lower altitude at once, or rest for 24-48 hours and not advance any higher unless the symptoms improve.