Low Pain Threshold

Low Pain Threshold is one of Fallout GURPS disadvantages. See: Fallout GURPS.

Overview
"You are extremely susceptible to pain of all kinds. Double the "shock effect" of any injury - e.g., if you take 3 points of damage, DX is at -6 on your next turn. You always roll at -4 to resist physical torture. Whenever you take a wound that does more than 1 hit of damage, you must roll vs. IQ to avoid crying out (possibly giving away your presence). Barbarians, soldiers, thugs, etc., will react to you at -1 if they know you have this disadvantage."

- Steve Jackson Games GURPS sources

In Fallout
With the abandonment of GURPS, Low Pain Threshold was removed from the game