If you think your Pug has a skin problem, the first thing to do is use a comb and simply comb against the natural growth of the hair - that is, comb backwards. Itchy Skin Fleas Itching and scratching primarily in Pugs focusing around the back end. If you comb backwards you'll often see black specks in the coat which are flea feces and white specks which are flea eggs. Your Pug may also sneeze, have watery eyes and a runny nose, just like human allergy sufferers. This problem may develop at the same time each year if it is linked to pollens.
Most inhalant allergies seem to be genetically passed on.
After a flea problem, Pugs often have a rash where the fleas were concentrated. The scratching and itching will continue after the fleas are dead because the Pug is allergic to the flea saliva, which is still circulating in the bloodstream. Your Pug is basically reacting to something he comes into contact with when he has contact dermatitis which is basically a skin irritation. The problem is only allergic when repeated exposure to normal substances, like grass, or poison ivy, causes the problem. The skin problem can spread past the point of contact, but almost always starts in the original contact area.