There are four types of skin problems cats can have as a result of allergies: hair loss
without much skin changes; miliary dermatitis - which causes small pinpoint
scabs, especially on the neck and
over the hips and tail base; eosinophilic granulomas - which are raised, red, hairless lesions, commonly on the lips, but can be lower on the jaw or neck, or even on the rear legs; severe itchiness at the face or neck.