In a Naruto sick fanfic, one possible reason for his illness could be a curse. Maybe he was targeted by an enemy ninja who cast a powerful and slow - acting curse on him. This curse could be sapping his chakra and making him physically weak.
Another reason might be related to overexertion. Naruto is known for pushing himself to the limit. He could have overused his chakra in a previous battle or during intense training, and his body just couldn't recover properly, leading to an illness.
One possible reason could be a magical curse. In the world of Merlin, there are many dark sorcerers who might target Arthur. Another reason could be a poisoned weapon. If he was injured during a battle, the poison on the blade could make him sick. Also, it might be a result of some ancient plague that has resurfaced in Camelot.
Well, perhaps in this fanfic, Naruto's family has a different set of values compared to Naruto. His determination to become Hokage and his unwavering belief in himself might be seen as over - ambitious or self - centered by his family. His family, who might prefer a more low - key and traditional lifestyle, could start to hate him because they think he is disrupting the family's harmony and going against their long - established ways.
One possible reason could be that his parents are extremely busy with their own important ninja duties. In the Naruto universe, ninjas often have to go on dangerous missions. His parents might be so preoccupied with protecting the village from external threats that they simply don't have the time to notice Naruto. Another reason could be some sort of curse or spell that has made them oblivious to Naruto's existence. This could be part of an evil plot by an enemy who wants to isolate Naruto and make him feel alone.
One possible reason could be a magical curse placed on him. Maybe some dark wizard who hated his parents decided to target him from a very young age. Another reason might be related to his unique magical nature. Since he is so powerful, his magic might be unstable at such a young age and could be making him sick as his body tries to adjust.
One possible reason could be that Naruto was taken for his special chakra. In the Naruto universe, his chakra is unique as he is the jinchuriki of the Nine - Tails. Some evil forces might want to control or study his chakra, so they take him from his parents. Another reason could be related to a prophecy. Maybe there are those who believe Naruto will bring great change, either good or bad according to their perspective, and they take him to try and influence his future.
One possible reason could be some kind of dark magic or jutsu that has affected his family's memories. Maybe an enemy cast a spell specifically to make his family forget about him to weaken him.
One possible reason could be that he's framed for a crime he didn't commit. Maybe someone powerful wants to get rid of him and plants false evidence. For example, they could make it seem like he attacked a village ally when in fact he was defending it from a hidden enemy.
One possible reason could be fear. The villagers might be afraid of Naruto because of the Nine - Tailed Fox sealed within him. They see him as a potential threat and lash out in their fear. Another reason could be jealousy. Naruto is a powerful ninja in the making, and some villagers, who are not as strong or talented, might take out their insecurities on him.
One possible reason could be a misunderstanding. Maybe there was some false information spread about Naruto that made Team 7 believe he had done something unforgivable. For example, if an enemy framed Naruto for attacking the village secretly, and Team 7 fell for it without proper investigation.
Well, sometimes in fanfiction, the author wants to explore the theme of loneliness. So they create a scenario where Naruto's friends abandon him because they are influenced by the village's elders. The elders might spread false rumors about Naruto to maintain their control. His friends, being young and naive, believe these rumors and turn their backs on Naruto, which then leads to Naruto's journey of self - discovery and growth in solitude.