Each body location that is damage or at zero recovers one hit for every 24 hours of complete rest. A location that has been reduced to -1 and treated with bind wounds, will require a full week to recover to zero, then recovers at the rate above.
Subdual damage is recovered at the rate of one hit for every ten minutes of complete rest. For more information about subdual damage.
Creatures with total body hits will recover three hits per 24 hours of rest.