Cellular Regeneration Ejection

As the originator of Orochimaru's Juinjutsu and the possessor of a unique clan ability, Jūgo is able to give his flesh to those that are compatible with said cursed seals, thus healing any injuries they may have received. Because he is transferring his cells to the recipient, Jūgo's own body regresses in age, becoming younger in appearance. The effects, however, are temporary and can be reverted using the counterpart for this technique.

Trivia

 * In the Fourth Shinobi World War, Kabuto Yakushi revived Sasuke Uchiha in a similar manner, by connecting his navel snake with Sasuke's torso and apparently using Hashirama Senju's cells, along with a certain someone's advice.