Physical abuse is also a possibility. He could be physically assaulted by antagonists in the fanfiction. This could range from minor altercations to more serious and violent attacks. Another type could be psychological abuse. For example, being manipulated or gaslighted into believing false things about himself or his past.
It's possible that in some Ramce fanfiction Harry is abused. Fanfiction is a creative space where authors can take characters in many different directions. In some cases, an author might decide to put Harry through an abusive situation to explore how he would react, grow, or change as a result. But this would be just a small fraction of all the Ramce fanfictions out there. Many other fanfictions in this category would likely focus on different aspects such as relationships, adventures, or new magical elements rather than abuse.
One possible type could be physical abuse, where the story might depict him being physically harmed by other characters. Another could be emotional abuse, like being constantly belittled or manipulated. However, such portrayals are not in line with the essence of the character in the original show.
One common type could be physical abuse. Some fanfictions might put him in situations where he's physically tortured, perhaps by villains who want to break his spirit. Another type is emotional abuse, like being betrayed by those he trusts. This can add a layer of drama to the story.
One consequence could be that Harry becomes withdrawn. He's so used to the abuse that he doesn't trust people easily. He might have nightmares often, reliving the moments of abuse. For instance, if Vernon has hit him before, he could have flashbacks in his sleep.
One possible reason could be Snape's lingering resentment towards James Potter, Harry's father. Snape might see Harry as a reminder of the bullying he endured from James during their school days. So, he takes out his anger on Harry.
One negative impact is that it can distort the perception of healthy relationships. Since Ron and Harry are well - known characters, presenting an abusive 'romance' between them can give readers the wrong idea about how relationships should be. Another impact is that it can be emotionally disturbing for some readers, especially those who have experienced abuse or are sensitive to such themes.
Maybe he notices Harry's unusual behavior, like being overly withdrawn or flinching at sudden movements. That could be a sign that makes Dumbledore suspect abuse.
Dumbledore could start providing Harry with special magical training to help him build confidence and defend himself, not just from physical threats but also from the emotional aftermath of the abuse. He might also arrange for some sort of therapy within the wizarding world, like using magical creatures or spells to heal Harry's emotional wounds.
One scenario could be that it's a celebration at Hogwarts. After a big Quidditch victory, a female fan of Harry's runs up and gives him a lipstick kiss on the face. Another could be that it's a part of a school play, and the lead actress, who has a crush on Harry, gives him an unscripted lipstick kiss on the face during the performance, causing chaos and laughter among the students.
I'm not sure if 'harry abuse fanfiction' is particularly popular. While there are many different niches within the vast world of Harry Potter fanfiction, the idea of focusing on Harry's abuse might be a rather niche and darker topic that may not appeal to the mainstream fans of the series who are more drawn to the positive, magical elements.