Guild Wars 2

It says +20 health but when I remove or equip the piece of armour the health does not change.

Am I reading this wrong and it doesn’t add 20 directly to health?

Can anyone throw any light on this?

its give u +20 to healing power not to ur HP !!
+heal means make ur heal and regeneration stronger !
if u want make ur health pook biger u need vitality