My cat is licking everything. Why is it doing this?

It is known that cats with an upset gastrointestinal tract can start licking things excessively. In addition to licking other symptoms such as nausea, vomiting, diarrhoea and flatulence may be present. It is wise to consult a veterinarian if you are concerned. If the veterinarian considers your cat to be healthy the next step would include contacting a cat behaviour specialist for help.