Well, in the fanfiction, the 10th Doctor could suffer physical hurt from all sorts of things. Maybe a crash landing during time travel or being attacked by a powerful monster.
It could be due to various imaginative plot devices created by the fanfiction author. Maybe in a battle with a powerful villain or during a risky adventure.
Well, it varies in different fanfics. The 11th Doctor could be hurt by powerful villains, or maybe in trying to save someone. It could also be from internal conflicts or emotional stress.
There are various plots. Sometimes they might face dangerous aliens or get trapped in perilous time loops that cause them harm.
Often, these fanfictions might involve one of them getting injured or facing a difficult situation, and the other providing support and solace. It could also be about internal struggles and how they find comfort in each other's presence.
It could vary depending on the creativity of the fanfiction author. Sometimes it might be in a battle with a powerful villain, or due to a risky experiment gone wrong.
In many fanfictions, the 13th Doctor might get hurt during intense battles with villains or in risky time-travel adventures.
It could be for various reasons, like to create drama or advance the plot.
You could write a story where they team up to face a common enemy. Maybe it's a threat that only their combined skills and knowledge can overcome.
I can recommend 'The Time Healed Wounds' - it's a great one where they comfort each other after a particularly tough adventure.
Well, there are all sorts. Maybe one where the Doctor gets injured in a battle with a powerful alien foe.