What’s wrong with a cat with a yellow nose that hasn’t cleared up in half a year?

A cat that has been spraying yellow snot for most of the year may be due to a viral infection of the respiratory tract, such as: cup virus, herpes virus. These viruses may be carried for life and even if the symptoms disappear temporarily, they may develop again as soon as the cat’s resistance and immunity decreases. It is recommended to take the cat to the vet in time for examination.