My boyfriend claims he's allergic to my cat, but his only symptom is getting itchy bumps on his scalp. Could this really be a cat allergy? Any suggestions to help him relieve this? He is moving in with me next week and I am currently working on cleaning my house very thoroughly, installing allergen free bedding, and will probably keep the bedroom cat-free. Also thinking about
an air-purifier... but reluctant to invest a lot of money if it won't help.