I've just ordered some generic Piriton pills and evening primrose oil to try the last treatment reported as successful here, by pringle01.
Our westie's nearly eight now, and didn't really get this skin problem till a year or so ago. That's about when it started.
He gets bathed regularly with a shampoo containing olive oil, tea tree oil, and cedar wood oil, plus he already gets a daily dose of cod liver oil. He also recently developed swelling of the anal scent gland, and bilious vomiting syndrome.
The vet recommended he be neutered, and I finally caved in and betrayed my little friend by permitting that to be done. It fixed only the scent gland problem.
I seem to have solved his stomach problem by adjusting his diet to wet food only, and I mix that up myself. A recipe or two can be supplied on request. Plus he gets a very small daily dose of the generic gastric acid reducer famotidine, but I may cut that out soon to test whether the adjusted diet alone is enough.
Now I'll work on the skin issue as described, and update here when I know the results.
I should mention that the bathing seems to help keep the skin problem under control, but there's plenty of room for improvement.
Meanwhile, he does not scratch and nibble at himself or appear to be suffering with it.
Later then,
T