Lava Elementals are a type of Elemental creature in Baldur's Gate 3. Their presence disturbs nearby lava and they heal while standing in lava.
These elemental creatures can manipulate lava. They rapidly heal while standing in lava and can use their Create Lava ability to create lava underneath them if no lava is nearby. Controlling and removing a Lava Elemental's access to Lava is key to defeating one. Note that effects that prevent the target from regaining hit points, such as the Bone Chill spell, will prevent the regeneration regardless of whether the Elemental is in lava.