HEALTH

Your health or HP will come back over time. Faster if your in the right spot.
Regen rates:

Sleeping -> Regen = top level + ( RCV * 4 )
Resting -> Regen = top level + ( RCV * 2 )
HEALING Room -> Regen = 300 + RNG((RCV * 10),(RCV * 20))

Give Nurse Joy 10,000 credits and she will heal you quicker.