Perennial allergic rhinitis refers to rhinitis that is not affected by seasonal changes and can be triggered by allergen stimulation in the environment, which is mainly manifested by perennial symptoms such as nasal congestion, sneezing, nose itching and runny nose, etc. The causes of the disease may be related to genetic factors, environmental factors and endocrine disorders. 1. Common allergens: If the patient inhales a series of allergenic substances such as animal dander, animal hair, cotton wool, dust, or comes into contact with alcohol, paint, irritating cosmetics, it may lead to perennial allergic rhinitis attacks; in addition, if the patient eats allergenic substances such as eggs, milk, or fish and shrimp, it will also cause the disease to flare up. 2. Genetic factors: this disease has a certain relationship with genetic factors, if the patient himself belongs to the allergic body, once contacted with allergens, the chances of attack greatly increased. 3. Environmental factors: If the patient’s environment contains formaldehyde, ammonia oxides and other items, it may cause changes in the sensitivity of the nasal mucosal nerves, increasing the chances of symptoms. 4. Endocrine disorders: If the patient has adrenal gland, pituitary gland, hypothyroidism and menstrual disorders, it may also cause the onset of this disease. Perennial allergic rhinitis, need to follow the doctor’s instructions standardized treatment, life try to avoid contact with allergens.