Mystery is often present as well. There could be unexplained events in the hospital, like strange disappearances of patients or odd magical phenomena. In some fanfictions, the main character has to solve these mysteries to ensure the safety of everyone in the hospital.
One great 'Harry Physical Hospital' fanfiction is 'Healing in the Hospital Halls'. It focuses on the characters' experiences within the hospital setting, with interesting character development and unique plot twists.
Perhaps Harry will run into an old wizard who has been in the hospital for a long time. This wizard has a lot of stories about the old days of the wizarding world and gives Harry some valuable advice.
Maybe he'll encounter a group of young wizards and witches who are also patients. They could form a bond and share their magical experiences. For example, they might talk about their different encounters with magical creatures outside of Hogwarts. This group could also play a role in helping Harry solve a problem that arises during his time in the hospital, like a malfunctioning magical device that is causing chaos in one of the wards.
Maybe Harry is injured during a Quidditch match and has to be rushed to the hospital. There he might meet some interesting new characters, like a healer with a mysterious past.
One possible plot could be that some of the Hogwarts students end up in a mental hospital due to the trauma of the wizarding wars. They form a support group within the hospital, using magic secretly to heal each other's mental scars. For example, Harry Potter could be haunted by the deaths he witnessed and struggle with PTSD in the hospital. Hermione might use her knowledge to research magical cures for mental illness.
Hermione would surely visit. She'd be there with a stack of books, ready to help Harry catch up on his studies while he recovers. And Ron would be right beside her, probably with some treats from the Hogwarts kitchen.
In fanfiction, Harry Potter in the hospital wing might have strange visions. Maybe he sees the memories of other Hogwarts students who were once treated there. It could be a way for the author to introduce some hidden lore or backstories of the school.
In some Harry Potter hospital fanfictions, there could be a scenario where a student gets injured during a Quidditch match and is rushed to the hospital wing. There, Madam Pomfrey uses her magic to heal the student in a very unique way, like using special potions that are not mentioned in the original books.
A young boy had to have his appendix removed. In the hospital, the doctor met with the boy before the operation. The doctor explained what was going to happen in a simple way so the boy wouldn't be too scared. During the operation, the doctor was very careful. After the operation, the doctor visited the boy regularly to check his recovery. The boy was soon on the mend thanks to the doctor's skill.