Well, in some fanfictions, Kagome might hurt Inuyasha by saying mean things. For example, she could bring up his past mistakes or insecurities in a cruel way during an argument. This could really wound his pride and his feelings towards her.
Well, in some fanfictions, Inuyasha might hurt Kagome's feelings by being overly possessive. For example, he could get jealous when Kagome talks to other male characters and then say something harsh. Another way could be that he doesn't trust Kagome's judgment at times, like when she tries to come up with a plan to deal with a demon and he dismisses it rudely, making her feel unappreciated.
Inuyasha is devastated when Kagome gets hurt. He blames himself, especially if he was supposed to be protecting her. He'll pick her up gently and try to find a safe place to tend to her wounds. He might also call for help from his friends like Miroku or Sango. He'll stay by her side until she recovers, constantly on guard against any further threats.
Kagome could also be pressured by outside forces in the fanfiction world. Maybe her family or friends in her own time have certain expectations of her that conflict with her relationship with Inuyasha. So, to please them or to avoid getting in trouble, she might do things that hurt Inuyasha, like breaking off their relationship suddenly or treating him coldly.
Kagome might respond with anger. She could be furious at Inuyasha for his betrayal and might lash out at him. She might use her spiritual powers against him in a fit of rage.
Well, there could be a situation where they are having a quiet moment alone, perhaps by a beautiful, serene lake. Inuyasha, who has been struggling with his feelings for a long time, finally gathers the courage. He looks into Kagome's eyes and simply says something like 'Kagome, I love you.' It's a very straightforward yet heart - warming way of confessing.
At first, their relationship would be severely strained. Kagome would be angry and scared, feeling betrayed by Inuyasha. She might not trust him at all anymore.
One common scenario is when Kagome is attacked by a demon while she's separated from Inuyasha. Maybe she's out gathering herbs or something and a lesser - known demon sees her as an easy target. Another situation could be when she gets caught in the crossfire during a battle between Inuyasha and a powerful foe. The enemy might target her to get to Inuyasha.
The jealousy in fanfiction can both strengthen and strain their relationship. On one hand, it shows that they value each other enough to be possessive. For example, if Inuyasha gets jealous when another man flirts with Kagome, it might make Kagome feel special. But on the other hand, too much jealousy can lead to fights. If Kagome is constantly jealous of Inuyasha's past with Kikyo, it can create a rift between them.
Often, Kagome's injury is a catalyst for character development. Inuyasha may realize just how important she is to him on a deeper level. He might start to see her not just as a comrade in arms but as someone he can't live without. The other characters also have to adapt. Shippo might grow up a bit, trying to be more helpful in taking care of Kagome, which changes his role in the group.
Inuyasha may become uncharacteristically gentle. He'll softly speak to Kagome, asking how she feels. His actions are driven by his deep - seated feelings for her. He might even share some of his own insecurities with her while she's sick, like how scared he is of losing her. He'll also be on high alert for any danger, ready to defend her at a moment's notice.