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Rad Child is a Fallout: New Vegas and Fallout Tactics perk and a Fallout: Brotherhood of Steel skill.

When you get any sort of radiation sickness, your health regenerates, the effect becoming more powerful with every threshold reached. However, radiation will continue to build up in your system, and can still kill you at the fatal threshold as normal.

Fallout: New Vegas

The health regeneration kicks in when the player gains radiation sickness and becomes more powerful depending on the severity:

  • Minor (200 rads): +2 health per second
  • Advanced (400 rads): +4 health per second
  • Critical (600 rads): +6 health per second
  • Deadly (800 rads): +8 health per second

You will still die when you reach 1000 rads. This perk does not heal limbs.


  • As a point of reference, the Monocyte Breeder implant heals +0.1 health per second, and Solar Powered (with patches) heals +1 health per second. This means that even Minor Radiation Poisoning is twenty times more effective than the implant, and twice as effective as the Solar Powered perk.
  • Some creatures (like glowing ones and golden geckos) have radiation attacks, which can kill a player at the edge of deadly radiation poisoning.
  • Like the monocyte breeder, this perk allows you to heal while waiting/sleeping. However, because of how much faster Rad Child heals, this perk almost obviates the need for sleep, as waiting one game hour will restore 240 to 960 health. Even just fast traveling can result in a full health bar.
  • This synergizes poorly with Radiation Resistance perks, such as Lead Belly, Implant Y-3 and Rad Resistance, since they reduce the amount of radiation you gain, making it more difficult to reach the threshold needed for it to take effect, as well as Rad Absorption, since it periodically flushes radiation from your system.
  • It synergizes extremely well with the Old World Blues perk Atomic!
  • This perk is very beneficial if Dead Money is installed. Since you cannot wait or sleep in exterior zones to restore health, this perk helps with restoring health lost due to Cloud exposure.

Fallout: Brotherhood of Steel

With this skill, Cain restores HP whenever he takes radiation damage. To take it, the player must be Level 10.

See also

Rad Regeneration - A similar perk in Fallout 3.