You can wake up a sleeping hamster, but it's not recommended. The biological clock and sleep habits of hamsters are quite different from those of other mammals. They sleep for a long time during the day and are more active at night. If you often disturb a hamster while it's sleeping, it may disrupt its biological clock, leading to poor rest and even shortening its lifespan.

Sleep Habits of Hamsters: Hamsters are usually more active between 11 p.m. and 5 a.m., and they spend most of the daytime sleeping. Their sleep behavior is significantly different from that of other mammals. They often wake up suddenly during sleep, eat a little bit, and then go back to sleep.
Methods to Wake Up a Hamster: If you want to wake up a hamster, you can try some gentle methods. For example, gently pat its body or speak softly. You can also move it to a brighter place and let it wake up naturally.
Precautions When Waking Up a Hamster: When waking up a hamster, be careful not to be too forceful and don't shout loudly, as this will make it feel scared and may even affect its sleep quality. Also, don't suddenly expose it to a new environment, such as moving it to another room, as this may make it feel uneasy.