1. Not adapting to the new environment: Hamsters will hide in their nests after changing to a new environment. When they confirm that there is no danger around them, they will come out to play.

2. Cold: It may be caused by insufficient feeding that causes the hamster to catch a cold, causing the hamster to not like to exercise and hide in corners and other places.

3. Wet tail syndrome: Hamsters suffering from wet tail syndrome will suffer from listlessness, loss of appetite, etc. They will stay in the nest motionless, with weak limbs and look limp.

4. Joint damage: Due to accidental injury or stimulation, joint injuries such as fractures occur, resulting in lack of energy.

5. Hypoglycemia: Failure to feed food on time may lead to hypoglycemia or parasite infection.

6. External stimulation: It may be a stress reaction caused by external stimulation.

Tips:

Owners must do their homework before raising a hamster to avoid serious consequences caused by not discovering it in time when the hamster is sick. If the hamster does not improve within three days, it is recommended that the owner take the hamster to a pet hospital for treatment immediately.