Always make sure that you have a well-stocked and suitable medical kit as well as adequate insurance in case you require to be evacuated. The most imperative thing is; don’t fear. A minor case of diarrhea is to be predictable, as well as sprains and muscle aches – all a part of walking in the hills. Altitude sickness is tremendously unsafe but mostly avoidable if you follow a few simple rules: trek high and sleep low, drink at least 3 litters of water per day (not including beer or soft drinks), and be sensible. If you feel shortness of breath, a minor headache or dizziness, tell your porter/guide and rest immediately. Lie down, drink water. If you are still feeling unwell you may consider going down a few hundred meters. Do not pretend you are okay, and do not go down alone. Descending few hundred meters and sleeping overnight may be enough to make you completely able to begin trekking again.