Rhinitis is an inflammation of the nasal mucosa membrane, which causes nasal congestion, rhinorrhea, and variable associated symptoms depending on etiology (eg, itching, sneezing, watery or purulent rhinorrhea, anosmia)
Rhinitis is classified as allergic or nonallergic. The cause of nonallergic rhinitis is usually viral, although irritants can cause it
ACUTE RHINITIS
Acute rhinitis, manifesting with oedema and vasodilation of the nasal mucous membrane, rhinorrhea, and obstruction, is usually the result of a common cold; other causes include streptococcal, pneumococcal, and staphylococcal infections.
CHRONIC RHINITIS
Chronic rhinitis is generally a prolongation of subacute inflammatory or infectious rhinitis. It may also rarely occur in syphilis, tuberculosis, rhinoscleroma, rhinosporidiosis, leishmaniasis, histoplasmosis, and leprosy—all of which are infections characterized by granuloma formation and destruction of soft tissue, cartilage, and bone.
Nasal obstruction, purulent rhinorrhea, and frequent bleeding result.
Rhinoscleroma causes progressive nasal obstruction from indurated inflammatory tissue in the lamina propria. Rhinosporidiosis is characterized by bleeding polyps.
ATROPHIC RHINITIS
Atrophic rhinitis, a form of chronic rhinitis, results in atrophy and sclerosis of mucous membrane; the mucous membrane changes from ciliated pseudostratified columnar epithelium to stratified squamous epithelium, and the lamina propria is reduced in amount and vascularity.
Atrophic rhinitis is associated with advanced age, granulomatosis with polyangiitis (GPA, formerly known as Wegener granulomatosis), and Iatrogenically induced excessive nasal tissue extirpation.
SYMPTOMS AND SIGNS
Acute rhinitis results in cough, low-grade fever, nasal congestion, rhinorrhea, and sneezing.
Chronic rhinitis manifestations are similar to those of acute rhinitis, but in prolonged or severe cases, patients may also have thick, foul-smelling, mucopurulent drainage; mucosal crusting; and/or bleeding.
Atrophic rhinitis results in enlargement of the nasal cavities, crust formation and malodorous bacterial colonization, nasal congestion, anosmia, and epistaxis that may be recurrent and severe.