Another trope is the 'mysterious injury'. Dean gets hurt by some unknown or supernatural force. This then leads to an investigation to find out what caused the injury and how to stop it from happening again. Writers use this to create suspense and mystery in the story, keeping readers on their toes as they follow Dean's journey to figure things out while dealing with his pain.
The 'alternate universe' trope is quite common too. For example, there are fics where Dean and Castiel are in a modern - day high school setting instead of the supernatural world they're usually in. It gives a fresh take on their characters and relationship.
There's a fanfic called 'Dean's Pain'. In this, Dean gets seriously hurt by a supernatural creature. It delves into how he copes with the pain both physically and mentally, and also how his friends in the hunting community rally around him. It's a really engaging read as it not only focuses on his injury but also on the relationships in his life.
You can try Archive of Our Own (AO3). It has a vast collection of Supernatural fanfictions, including ones where Dean gets hurt. Just use the search function and type in relevant keywords like 'Supernatural Dean hurt'.
One popular story could be about their adventures together against a powerful new enemy. In the fanfiction, they might have to rely on each other's unique skills. Gabriel with his trickster abilities and Dean with his hunting expertise.
One popular trope is the 'hurt/comfort' scenario. For example, Dean gets injured on a hunt, and Cas takes care of him, which leads to a tender moment and a kiss. It plays on the emotional bond between them and the protectiveness they feel for each other.
One popular trope is the 'First Kiss' trope. It often builds up a lot of tension between Castiel and Dean before they finally share that first, passionate kiss. Another is the 'Forbidden Love' trope, as their relationship within the context of the show has many obstacles, and this is often explored in fanfiction with their kisses being something that goes against the norm or is kept secret.
The theme of Dean being tortured by supernatural forces is also quite common. This could be at the hands of demons or other malevolent entities. It not only shows his physical pain but also his mental strength in trying to endure such torture. Additionally, there are fanfictions where Dean's hurt is related to his inner struggle with his identity as a hunter, a brother, and a man, which adds an extra layer of complexity to the story.
One example could be a fanfiction where Dean is physically hurt during a hunt gone wrong. Maybe he's attacked by a powerful demon and sustains serious injuries. This can add drama and tension to the story as other characters, like Sam, have to find a way to save him.
One popular trope is the physical injury trope. For example, Nancy might get injured while solving a mystery, like getting trapped in an old building and getting a sprained ankle. This adds an element of vulnerability to her character.
A common trope is 'character crossovers'. Fans often write about the sisters from Charmed meeting Sam and Dean Winchester from Supernatural. It creates interesting dynamics as they have different ways of dealing with the supernatural. 'Time - travel' is another trope. Maybe a character from Supernatural travels back in time and meets the ancestors of the Charmed ones. And then there's the 'hidden family connection' trope, where it's revealed that there's some long - lost family tie between a character from Charmed and one from Supernatural.