Thank you guys for your advises. My tortoise is acting actively again, it starts to eat, explore, and drink again! Maybe it's just tired yesterday, so it sleeps outside of its hide while basking at the same time.
So my tortoise is acting weirdly today.
· It normally wakes up when the sun is up and sleep in the evening, but today it woke up in the afternoon and I noticed that it always shuts it's eyes for a while every few minutes or so. However, I do not see any swollen eyes. (Maybe shutting its eyes...