Radiation in Fallout 4 is a mechanic that affects your maximum health.

  • Health is shown by a bar on the lower left and when the player gets radiated, the HP bar starts filling with red for each point of Radiation, reducing Max Health by the radiated amount.
  • Many things left in the world are irradiated and can inflict rad damage on you, including Consumables and bodies of water.

Removing Radiation

Preventing Radiation


  • If too much radiation is sustained (3/4 of the health bar), the vault boy in the STAT section of the Pip-Boy turns into a ghoul like person.

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