Cats will hiss (it is generally thought) for one of two reasons, either they feel threatened or they are feeling aggressive or it may be a combination of the two.
Often hissing will simply be a way of telling another cat or human etc that the cat is present and is not going to be pushed around. It will often hiss to just register its status and thus try to deter any further activity or aggression from the human or cat to whom the hiss has been directed.
If a cat does hiss at you it is important to avert your gaze from it. If you continue to stare or look at it then it will interpret this as a sign of aggression and continue to hiss and this may escalate into a fully fledged 'cat attack'.
By looking away you are acknowledging that it has signalled either fear or anger and you are sending it a message that you do not mean any aggression towards it, so hopefully it should stop hissing.
Often hissing will simply be a way of telling another cat or human etc that the cat is present and is not going to be pushed around. It will often hiss to just register its status and thus try to deter any further activity or aggression from the human or cat to whom the hiss has been directed.
If a cat does hiss at you it is important to avert your gaze from it. If you continue to stare or look at it then it will interpret this as a sign of aggression and continue to hiss and this may escalate into a fully fledged 'cat attack'.
By looking away you are acknowledging that it has signalled either fear or anger and you are sending it a message that you do not mean any aggression towards it, so hopefully it should stop hissing.