The manifestation of feeling itchy nose while sleeping is commonly known as allergic rhinitis, which is a chronic form of rhinitis. During sleep, the indoor environment is relatively closed, and due to the stimulation of cold air or inhalation of allergens such as dust mites, dust, or even pollen in the room, the mucous membrane of the nasal cavity becomes hyper-reactive, manifesting as congestion, edema, and the exudation of a large amount of inflammatory secretions. At this time, the nasal cavity will feel itchy and may be accompanied by sneezing and clear nasal discharge. In clinical practice, blood tests and allergen testing are required to identify the cause of allergic rhinitis, avoid contact with allergens, and give appropriate anti-allergy medications such as cetirizine and paracetamol to relieve symptoms.