An itchy nose, eyes and throat may be due to allergic rhinitis. Allergic rhinitis is a condition in which allergy sufferers come into contact with allergy-prone substances, resulting in symptoms such as nasal congestion, sneezing and runny nose. Allergic substances not only stimulate the nasal cavity leading to the occurrence of allergic rhinitis, but also stimulate other skin and mucous membranes to appear itchy symptoms, the occurrence of allergic conjunctivitis and allergic pharyngitis, which leads to the symptoms of itchy eyes and throat. Also. The nose is connected to the eyes through the nasolacrimal duct, and inflammation of the nasal mucosa can also occur through the nasolacrimal duct as a retrograde infection, leading to symptoms of congestion, itching, and increased secretion in the conjunctiva of the eyes. Moreover, due to the inflammation of the nasal cavity, the mucus gland secretion increases, and the nasal mucus flows backward to the throat, stimulating the throat will also appear itchy feeling. It is recommended to go to the hospital, test for allergens, stay away from allergens after clarifying allergens, and follow the doctor’s instructions for anti-allergy treatment if the symptoms are serious to relieve the symptoms of itchy nose, eyes and throat.