In some fanfictions, Sakura's jealousy can be a factor. If she sees Naruto getting close to another girl, she might lose her temper and accidentally hurt him in the heat of the moment. This shows a more flawed side of her character, which is interesting to explore in fanfiction.
One common reason is miscommunication. If Sakura misunderstands Naruto's intentions, she might react harshly and physically harm him. For instance, if Naruto tries to keep a secret from her to protect her, but she misinterprets it as betrayal.
It could be due to Sakura's feelings for Sasuke. If she's overly focused on Sasuke and Naruto gets in the way of her plans regarding Sasuke in some way, she might lash out and hurt Naruto without really meaning to cause serious harm.
One common reason could be Sasuke's thirst for revenge. His single - minded focus on getting stronger and avenging his clan might make him overlook Sakura's feelings and accidentally hurt her. For example, he might leave her behind in a dangerous situation while chasing after an enemy related to his clan's massacre.
One common theme could be emotional hurt. For example, Sakura might say something really cruel to Naruto about how she'll never love him like he loves her, which shatters his heart. Another could be physical hurt in a more symbolic sense. Maybe in a battle situation where Sakura accidentally harms Naruto while trying to protect someone else, and Naruto has to deal with the pain and also the fact that Sakura didn't seem to fully consider his safety. There could also be themes of neglect, where Sakura is so focused on Sasuke that she completely ignores Naruto's feelings and in a way, that hurts him deeply.
One common theme is misunderstanding. Often, Naruto may misunderstand Sakura's intentions or vice versa, which leads to one of them getting hurt. For example, Naruto might misinterpret Sakura's concern for him as pity, and his reaction could hurt her.
One of the themes is self - discovery for Naruto. When Sakura hurts him, he might start to re - evaluate himself, his relationships, and his place in the world. For example, he could wonder if he was too naive in believing in their friendship. Another theme could be the consequences of power. Maybe Sakura, in her pursuit of power or in using her power, ends up hurting Naruto. And the theme of redemption might also be there. If Sakura realizes she has hurt Naruto, the story could be about her trying to make amends.
One reason could be that Sakura is confused about her own feelings. Maybe she has feelings for someone else and doesn't know how to handle Naruto's obvious affection towards her, so she lashes out and ends up hurting him.
One common theme is emotional vulnerability. Naruto and Sakura often open up to each other about their insecurities and fears. For example, Sakura might reveal her doubts about her strength, and Naruto will comfort her by reminding her of all she's accomplished.
One reason could be jealousy. If Naruto is getting more attention or has achieved more in the ninja world, his sister might be jealous and this could lead to her actions that hurt Naruto, either by spreading false rumors or directly confronting him in a hurtful way.
One common reason could be Naruto's growing popularity and strength. As Naruto becomes more powerful and well - liked in the fanfiction, Sakura might feel overshadowed. Maybe she's jealous of the attention he gets from their peers or even from her own friends.
One possible reason could be a misunderstanding. Maybe Sakura misinterprets Naruto's actions or words, thinking he has betrayed her or their friends in some way, which leads to her hurting him one last time in a fit of anger.