The skin bumps are likely a secondary skin infection which is common with feline itching. Chlorpheniramine maleate 4mg tablets are a mild inexpensive antihistamine effective to help reduce cat itching and allergies.
If there are no parasites such as fleas, there are many other allergens to which your cat is allergic causing the itching. An organic oatmeal bath is helpful to sooth irritated skin.
Your vet can also determined the exact allergen.
Dr Carol Osborne, DVM
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