While you climb or trek in Nepal you are likely to cross the high altitude area (2500 mtr/8200ft). At the altitude above this, it is quite common that one might experience the affect of thin oxygen experiencing the breathlessness, sleeplessness, mild headache, etc. This particular physical condition is called AMS (Acute Mountain Sickness) or Altitude Sickness. AMS's mild symptoms occur in approximately 20-40% of people crossing altitude area and this can be worse if not taken care properly or if not acclimatized properly. Trekking trips with Himalayan Pilgrimage is set to cope the guidelines given by AMS experts unless it's unavoidable. All of our guides are extensively trained about AMS and first aid. Following is the very brief information about AMS.