7yr old Siamese cat with skin problems/scratching?

When something similar happened to my male cat who is part Siamese, it turned out to be a food allergy. He is allergic to fish, corn, and wheat. Other common food allergens include chicken and beef. I strongly urge you to talk to your veterinarian about this possibility. I also strongly urge you to not feed your cat any Hill's Prescription Diet foods, as they are not of optimal quality. Learning how to read and understand the ingredients list on cat food will make a huge difference in your cat's long term health. Here is an article that will help you do that: http://www.catfoodguide.com/how-to-read-cat-food-l... and the site also has reviews of various brands of cat food, and other valuable information.

Should this turn out to be your cat's trouble, here is a good article that tells more about food allergies in cats: http://www.peteducation.com/article.cfm?c=1+1402&a...

Siamese Cat Skin Problems

It sounds like an allergy of some sort. My first guess would be a flea bite allergy. Some cats are so sensitive to flea bites that it only takes one bite and they are scratching for weeks. Even indoor cats can be exposed to fleas - we can bring them in on our clothes and shoes from the outdoors, and then they make their way to our cat. My little seal point female is so highly allergic to flea and mite bites that she must be on Revolution year round. Siamese are extremely sensitive and often high strung cats. Something like this really can cause them to become very anxious, which makes the itching and overgrooming worse. Ask the vet about flea medication for her, and of course something to relive the itching (probably a steroid shot).

SOUNDS LIKE SHE MIGHT HAVE AN ALLERGY TO SOMETHING. MY CAT GETS THE SAME THING AND SHE HAS TO TAKE A LIQUID MED CALLED "DERMA CAPS" EVERYDAY AND A ANTIBIOTIC. THEY SAID SHE JUST HAS ALLERGIES TO STUFF LIKE FLEAS AND POLLEN. MIGHT BE WORTH MENTIONING TO THE VET!