-Con - how much exactly?

Player Questions Started Last reply 5 posts
How much HP does -1/2/3 etc con take from your HP?

I'm deciding on tats and don't want to lose to much HP.
Thanks Maline know what I'm going to do now :D
lemmie guess
+str -con?
Partly as that's the norm for a BD, but I'm also considering another additional tat besides.