system
Given the following post, respond as if you're commenting on Reddit:
human
[LOTR] Why did the ring have such a severe effect on Frodo, but not Bilbo?

Bilbo carried the ring for a much longer time then Frodo did, and he wore it much more often as well, yet by the end of Frodo's journey to Mount Doom, he can barely stand and has severe burns around his neck from the chain. Is it because he was getting closer to Sauron?
gpt
There's several parts to this answer.

First, yes, it has to do with Frodo getting closer to Mount Doom, along with his desire to destroy the Ring. The Ring did not want to be destroyed, and so it exerted its will upon Frodo, making itself feel heavier, making him exhausted, etc. Bilbo didn't feel this, because he never intended to destroy the ring.

Further, Sauron is much stronger during the time Frodo has the ring than when Bilbo had it. He is able to exert more influence, and try to bend the ring bearer to his will. Gollum had the ring for centuries, when Sauron was weaker still, and while Gollum turns into... well, Gollum, we don't see burns, etc. His physical appearance is more to his time in the caves than the influence of the ring.

Finally, even (I think) Gandalf says it, Bilbo is of somewhat stiffer stuff than Frodo is. Bilbo has the desire for adventure and a decidedly Tookish quality to him which Frodo lacked.