This is not intended to be a medical explanation, but something based on experience with many people in high altitudes. The most common non-serious problems I have encountered with height gain are flatulence, upset stomachs, early onset of periods for women near their due date, and head aches.
Phuchen Lamas of the Nyingmapa sect of Tibetan Buddhism are different from the other Lamas in many ways. Phuchens are tantric Lamas.
A vast mountainscape in the north of India, home to some of the most surreal panoramas to be seen by a traveler.
This high altitude cold desert, hidden in the HImalaya is one of the most inhospitable and forbidding places one can see, and home to some of the toughest people on our planet.
It is better to have tried and failed than to have been too scared of failure to try
-- Myself