HP upgrade

Guys, i have a question....how do i increase and upgrade my HP ? Since i feel its stuck now....any suggestion ?
You just need to find gear that boosts vitality. Took me a while as well but I lucked out and got some legendary drops that doubled it.
Shiny
Alright...so HP based on vitality...got it. Thanks dude....sweeettt gear btw
Swap out gear to change your hp and damage on all pieces of armor and use gold to up your def and dam