A hissing sound following a cat's meow can be caused by a variety of reasons, such as being threatened, uncomfortable, or in pain. When cats feel threatened or attacked, they may hiss to scare the other party away. If your cat hisses during a conflict with other animals or people, it is recommended that you separate them and avoid further conflict.

In addition, cats may also make hissing sounds to express physical pain or discomfort, such as toothache or ear infection. If your cat makes hissing sounds, it is recommended that you observe its physical condition and seek help from a veterinarian.