A cat suddenly becoming hyperactive and running around may be caused by a variety of reasons. The following are some possible reasons:

Seeing prey: When cats see flying insects, mice and other prey, they will instinctively catch them, thus showing excited and running behaviors.

Estrus: Cats in estrus may exhibit excited and running behaviors due to the influence of hormones.

Being frightened: Cats are very sensitive animals. When they are frightened or anxious, they may run around. to release tension.

Consume energy: Some cats are very energetic and need to run to consume excess energy. This is especially common after cats sleep or eat for a long time.