Maybe have the other characters show concern and offer support while he heals. You could also incorporate magical elements to speed up the recovery process. It all depends on the tone and world-building of your fanfiction.
You could have him rest and recover gradually with the help of his friends and dragons.
One way could be to have Hiccup learn some important lessons during his recovery, like patience and reliance on others. Or, introduce a new character who has a special remedy for his broken ribs.
Maybe have a magical cure discovered. It could be a rare herb or a spell cast by a powerful wizard. But this might seem a bit too convenient. Another option is for Hiccup to learn to adapt and develop new skills despite his injury, like using his brain more to outsmart enemies.
Well, for this situation, you could have the other characters show concern and try to find a cure. Maybe involve a wise elder or a magical element to speed up his recovery. Also, describe Hiccup's discomfort and how it affects his dragon-riding skills.
You could focus on showing his gradual change through significant events or interactions with other characters.
One way is to introduce a special cure or remedy that Hiccup discovers during his adventures. You can also explore how his friends and allies support him through this difficult time.
One way could be for Hiccup to seek the help of other dragon riders or wise elders who might have knowledge about breaking the curse.
First off, you might introduce a wise healer character who knows the remedy. Or, you could have Hiccup's friends embark on a dangerous quest to find the cure. Another option is to have Hiccup's inner strength and determination help him fight off the poison gradually.
One way could be having his friends rally around to care for him and look for a cure.
Maybe Hiccup could learn some self-defense skills and stand up for himself. Or, he could find an adult he trusts to help him solve the problem. It all depends on how the story unfolds and what kind of tone you want to set.
Well, you might consider having other characters give him warm clothing or blankets. Or perhaps he could use his inventing skills to create a device that generates heat. Maybe there's a hot spring nearby that he finds and takes advantage of.
You could have other characters try to wake him up with various methods, like using magic or seeking help from a wise elder.