Treatment for cat hair allergy:
1. Drug treatment: Oral medications such as loratadine tablets and montelukast sodium tablets, and nasal sprays such as fluticasone or nasona may be used for allergies. Asthma patients can choose medications, inhalers, and inhalers.
2. Avoid contact with cats: Cat fur is the culprit for allergies, and the most direct solution is to stop owning cats. If this isn't possible, create an allergen-free area at home, such as the bedroom. Strictly prohibit cats from entering this area. 
Reasons for cat dander allergy:
Cat hair itself doesn't cause allergies. What causes allergies in humans is a tiny protein called an allergen. This allergen is present in a cat's sebaceous glands and is released through sebum. It adheres to dry skin, forming dandruff. Allergens can also be found in a cat's saliva and urine, and can be released into the air when the cat licks its fur. These allergens attach to cat dandruff or shed fur and can then spread throughout the home. Therefore, items like curtains and bed sheets can accumulate a lot of cat dandruff and fur, and it's essential to clean them thoroughly. Avoiding carpets, using a vacuum cleaner frequently, and regularly washing curtains are all effective ways to reduce allergens in the home.