Spring allergic rhinitis may be caused by inhalant allergens, ingestive allergens, etc. 1. Inhalation allergens: spring allergic rhinitis may be caused by inhalation allergens, such as house dust, fungi, animal dander, wind-borne pollen from various trees and grasses. When the particles of allergens are relatively large, they can be blocked down in the nose, causing an allergic reaction in the nasal cavity. Outdoor allergens such as pollen and fungal spores are also the main cause of spring allergic rhinitis, while indoor allergens such as dust mites, fungi, cockroaches, and pet fur are prone to cause perennial allergic rhinitis. 2. Ingested allergens: Food allergens not only lead to allergic reactions in the skin and digestive tract, but some people may also experience adverse symptoms in the nose. Common food allergens include milk, peanuts, eggs, mangoes, etc. Meanwhile, some medications may also induce allergic rhinitis. It is recommended that patients go to the hospital in time, under the diagnosis of the doctor, according to the specific condition of the patient, to take targeted treatment, life should avoid contact with food that can cause allergies, avoid contact with allergens, to reduce the number of episodes of symptoms.