I'm not sure which specific 'percy sick fanfiction' you're referring to. There are many fanfiction platforms like Archive of Our Own (AO3) where you can search for such stories. Try using relevant tags like 'Percy' and'sick' on AO3 to find what you're looking for.
One popular 'Percy Jackson sick fanfiction' is 'Under the Weather'. It shows Percy dealing with a strange illness that even his demigod powers can't easily shake off. The story does a great job of exploring how his friends, like Annabeth, react and try to help him.
One place to find such fanfiction could be Archive of Our Own (AO3). Just search for 'Percy Jackson Will Solace x Sick' on their site and you'll likely come across some great works. AO3 has a large and diverse collection of fanfictions for all kinds of pairings and themes.
There are 'naruto sick fanfiction' that focus on the emotional aspect when Naruto is sick. Maybe he's poisoned and is on the verge of death. His friends, like Sasuke, who usually seems cold, shows deep concern and they all recall their memories together, strengthening their bond in the face of Naruto's sickness.
One great Loki sick fanfiction is 'Loki's Illness'. It delves into Loki falling ill and how those around him, like Thor, react to his weakened state. It shows a different side of Loki, not the powerful and mischievous god but a vulnerable being.
In this kind of fanfiction, one scenario could be that Will Solace uses his healing powers to try and cure Percy. He might be really worried as Percy is not only his friend but also someone he cares about deeply. Maybe he brings Percy to the infirmary in Camp Half - Blood and stays by his side, constantly checking on his condition and using his medical knowledge and powers to make Percy better.
There are some 'Twilight sick fanfiction' that delve into the idea of a werewolf getting sick, which is quite an interesting concept considering their enhanced physical abilities. It could be a situation where Jacob is sick and the pack has to deal with it while also trying to keep it a secret from the vampires. You can try looking for these on platforms dedicated to Twilight fanfiction, and also check the reviews to see if other readers found them engaging.
There are many Naruto fanfiction out there with different themes. For 'baby naruto sick fanfiction', it might explore the more vulnerable side of Naruto. Some fanfictions could show how Naruto's early experiences with being sick influenced his later personality. It could also be a way to introduce new characters, like a healer who becomes important in Naruto's life. You could also check Naruto - related forums where fans might recommend some good 'baby naruto sick fanfiction'.
There may not be a great deal of 'diarrhea sick' fanfiction readily available. Most fanfiction writers tend to write about things like the relationships between characters, alternative storylines for a series, or exploring the backstories of characters. This rather strange and somewhat unappealing topic might not have a large body of work dedicated to it. You could try reaching out to some very niche fanfiction groups or forums and asking if anyone has written such stories, but don't be too surprised if you get no or very few responses.
One popular 'Draco and Hermione sick fanfiction' is 'Feverish Affections'. It shows a scenario where Hermione gets sick and Draco has to take care of her, which leads to some interesting character developments and a budding relationship.
Some 'sick snape fanfiction' stories are really engaging. For example, there are those that show how the Hogwarts faculty tries to heal him when he's fallen ill due to a cursed object. The way the different characters interact with a sick Snape can be really fascinating. It can range from Hermione's attempts to find a cure using her vast knowledge to Dumbledore's calm and collected approach in handling the situation. These fanfictions give a new perspective on Snape's relationships within the Hogwarts community.