Nasal obstruction can be due to several factors. The most common factors are allergy, infection and nasal deformity. Nasal allergy is normally treated with antihistamines and/or nasal steroids/antihistamine sprays. Sometimes chronic nasal obstruction leads to nasal turbinate hypertrophy (chronic swelling of the nasal tissues) and may benefit from surgery to relieve nasal obstruction. Nasal infections are normally treated with antibiotics and nasal saline rinses. Nasal deformity is usually a result of nasal trauma or nasal septum deviation both of which may require surgery to improve nasal breathing and function.