I think his family would be the first to help. His sisters could bring him cold compresses to reduce the fever, and his father would use his medical skills. And from the Soul Society, Renji might come to check on him, as he and Ichigo have a sort of friendly rivalry. He would want to make sure Ichigo gets better soon so they can have their next sparring match.
In fanfiction, Ichigo might get stronger through unique training regimens. For example, he could be trained by a long - lost powerful Shinigami. This Shinigami might have ancient techniques that are not known to the regular Soul Society. Ichigo would have to endure rigorous physical and spiritual training, pushing his limits far beyond what he thought possible.
Ichigo would also experience a period of sadness. He values his relationships, and when one is broken through betrayal, it would hurt him deeply. He might isolate himself for a while, brooding over what happened. But ultimately, he would use this experience to become stronger. He'd learn from it and be more cautious in future relationships, while still maintaining his core values of loyalty and trust.
There could be some very strange and out - of - the - ordinary fanfictions out there that might have such a plot. However, this kind of plot goes against the normal character relationships and storylines in the original Bleach series. Usually, fanfictions tend to focus on more traditional themes like battles, friendships, and power - ups rather than such extreme and uncharacteristic situations.
Mentors play a big role too. In fanfiction, a new mentor could be an ancient being from a different dimension. This mentor would guide Ichigo in mastering new forms of combat and spiritual control. They could teach him how to manipulate his spiritual pressure in ways he never thought of before, which would make him stronger.
From a storytelling perspective, it may deviate from the original spirit of the Ichigo character and the Bleach universe. Ichigo is typically portrayed as a strong and heroic character, and such a plot device can undermine that. Also, it might send the wrong message to the readers, especially younger ones who are fans of the series.
In the 'ichigo gets drunk' fanfiction, he might act in a very uncharacteristic way. For example, he could start being overly friendly or saying things he normally wouldn't. Maybe he'd lose his usual cool composure and start blabbing about his deepest secrets or feelings towards his friends or enemies.
I'm not sure if there is such a specific fanfiction. Fanfiction can cover a wide range of themes and scenarios, but this one might be a bit more on the extreme or niche side. You could try searching on popular fanfiction websites like FanFiction.net or Archive of Our Own, but be aware that not all content might be appropriate or in line with the original spirit of the series.
In the 'ichigo gets a fever fanfiction', it could start with Ichigo suddenly feeling unwell and getting a high fever. His family might be in a panic. His father, being a doctor, would first examine him. Meanwhile, his friends from the Soul Society could sense his weakened state through their spiritual connection and try to find a way to help him. This could lead to a series of events where they have to face challenges both in the human world and the Soul Society to get the right remedy for Ichigo.