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.
In a hurt comfort fic, perhaps Sakura has an emotional breakdown after a failed mission. Naruto finds her crying alone. He sits beside her and just listens as she pours out her frustrations. Naruto then shares his own insecurities, like how he sometimes doubts if he can really become Hokage. This mutual sharing of pain and comfort brings them closer, strengthening their friendship in a way that goes beyond their ninja duties.
In some fanfictions, Sakura might accidentally hurt Naruto during a training session. Maybe she uses a new jutsu she's not fully mastered and it goes wrong, hitting Naruto instead of the target.
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.
Well, in some Narusaku fanfictions, Sakura might hurt Naruto emotionally by choosing Sasuke over him repeatedly. This can make Naruto feel rejected and unloved, causing him pain.
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.
I like 'The Comfort After the Storm'. This fanfic focuses on Sakura dealing with Naruto's emotional pain after he loses a very important person. Sakura is there for him, and they have some really heart - to - heart conversations. It shows how their relationship can be so much more than just teammates.
In some Sasunaru fanfictions, Sakura might hurt Naruto emotionally. For example, if she chooses Sasuke over Naruto in a very cruel way, it can break Naruto's heart. She could say mean things about his dreams or his past as an orphan, which would deeply wound him.
Maybe Sakura has a near - death experience during a mission. Naruto is devastated when he hears the news. When Sakura recovers, Naruto is overly protective of her for a while. Sakura initially finds it annoying but then realizes it's because Naruto cares so much about her. They end up having a conversation where they both admit how important they are to each other in their lives. This kind of event can really enhance the hurt - comfort dynamic between them 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.