It could be due to a genetic mutation in the Naruto universe. In some fanfictions, there might be a hidden genetic factor in his family line that gets activated. For example, perhaps Minato or Kushina had a recessive gene for white hair that Naruto inherits and it suddenly shows up under certain circumstances, like extreme stress or a coming - of - age moment in his ninja journey.
Well, perhaps it's a sign of his connection to a new, mysterious entity. For example, he might have made a pact with a powerful ice - based spirit or demon, and as a result, his hair turned white like snow. Or it could be due to a powerful transformation that was caused by a unique combination of his Uzumaki and Namikaze bloodlines. In the world of fanfiction, there are countless ways to explain such a change, and this is just the tip of the iceberg.
Perhaps he is trying to distance himself from his past self. Naruto has had a tough childhood and has been through a lot. Changing his appearance could be a way for him to start anew, to shed the image of the 'troublemaker' or the 'lonely kid'. He might want to present a new, more confident and respected image to the people around him, both friends and foes.
It could be a result of a magical spell gone wrong. Maybe he was experimenting with some powerful magic, and it had an unexpected side effect on his appearance, turning his hair long and white.
Perhaps in the fanfic, Naruto is trying to fit into a different group or culture. His original hair style might make him stand out in a negative way in that context, so he changes it to be more accepted. Or it could be part of a bet or a challenge. For instance, he loses a bet with his friends and as a consequence, he has to change his hair style.
One possible reason could be extreme stress or trauma. In the Naruto universe, he has faced many difficult situations. If a fanfic writer wants to show the toll it takes on him, white hair could symbolize that. For example, if he loses someone very close to him like Sasuke in a more permanent way, it might be so devastating that it causes this physical change.
In some fanfictions, it could be related to a curse or a dark magic spell. There could be a hidden plot where an ancient curse is placed on Naruto, and as part of its manifestation, a hole appears in his chest, which could lead to all sorts of consequences for his health and his ability to use chakra.
Yes, it can. Piercings can add an edgy or unique look to Naruto in fanfiction. It might make him seem more rebellious or cool, different from his original appearance in the official series.
Another reason could be a personal journey of self - discovery. Naruto might feel that his identity as the hero of the village has become a burden or a limiting factor in his growth. Changing his identity could allow him to explore new aspects of himself, away from the expectations and responsibilities that come with being Naruto Uzumaki.
It could be a genetic quirk that was dormant before. In the fanfiction, the author might be exploring a different aspect of the Uzumaki genetics where Naruto inherits his mother's hair later in life for some reason. It could be related to his growth or a new power awakening.
One possible reason could be some sort of new chakra transformation. Maybe he taps into a different power source that affects his physical appearance, including his hair color. For example, if he were to inherit a special kekkei genkai from an unknown lineage that has the side - effect of changing hair color when activated.