Hi,

I had my shunt put in in 1982 then it was replaced about 6 months later when it blocked.

I have had no other trouble, however I use to suffer form miagrane headaches which were at first misdiagnosed as a problem with my shunt as the symptoms are very similar, ie horrible headaches and projectile vomitting.

I was planning on heading to South America and doing the Inca trail on my way back to australia, but dont know anything about altitude and my shunt. I have travelled quite a lot in the past but never that high up

PLEASE HELP

You need to contact a neurologist for this question. Planes are pressurized so that should not be a problem, but the inca trail does go through the mountains at higher altitudes. Do not rely on internet answers, get professional answers, you only get one brain in life, use it wisely!