When wearing high heels how much pressure is put on the body?

Pressure on the foot is the reaction from ground you are standing on,
you are right if the angle of distribution bigger then the stresses are distributed at a larger area,
but not necessarily the taller the heel the bigger the angle,
if the heel is thin and tall the load will be concentrated at a small area and high pressure,
but if the heel long but wide then the load can be distributed because the angle of distribution gets bigger.