during the fight with the Third Hokage received an irreparable injury from which he suffers terribly, one of the Hokage's techniques destroyed the soul of his hand, because of which now he cannot use his right hand, it practically rots and hurts terribly, he often suffers and practically screams in pain because of this, they are trying to cure it but can only prevent the condition from suffocating. he found it difficult to concentrate on anything other than the pain