Is there a spell or feat like this?

[Yqatuba]

Is there one where the more damage you take in a fight the more damage you hit for? Seems like a good spell for a bloodrager as I imagine if they are in a rage the pain of getting hit just makes them even more furious.

[Kayerloth]

dot.

[Wonderstell]

There's the Blood Rage spell which can give you a +10 morale bonus to strength depending on how much damage you've taken.

[Reloth]

i only know of one its called Sadomasochism but it isnt on the bloodrager spell list
Edit: my bad it is on the bloodrager list (http://www.aonprd.com/SpellDisplay.aspx?ItemName=Sadomasochism)

[Egil Firehair]

Burn sort of works this way, for a Kineticist with overflow.

1 point of Burn = 1 x level non-lethal damage that can only be removed when the Burn goes away after rest.

1 point of Burn = +1 to attack & +2 to damage, limited to 1 point per four levels (rather like Power Attack).