This chapter discusses inflammatory and other disorders of nasal cavity, where predisposing factors of acute rhinitis may be change of climate, temperature, humidity, poor nutrition, chronic sinusitis, fatigue, diabetes, tuberculosis and dysfunction of thyroid. Causative agents of acute rhinitis are the viruses such as rhinovirus, influenza and parinfluenza virus, syncytial virus, enteric cytopathogenic human orphan virus, coxsackie, adeno- and reoviruses. Usually transmission occurs by droplet infection such as sneezing and coughing. Complications of coryza may be nasopharyngitis, sinusitis, eustachian tube catarrh, otitis media, lymphadenitis, respiratory tract infection, tonsillitis, nephritis and rheumatism. Syphilis affects the bone, while tuberculosis affects the cartilaginous framework of nose. Sarcoidosis resembles tuberculosis except for caseation, and Kveim test and biopsy are diagnostic. Rhinitis sicca is a milder form of atrophic rhinitis which occurs in alcoholics, anaemia, nutritional deficiencies and persons working in hot, dry and dusty occupation. In chronic hypertrophic rhinitis there is hypertrophy of epithelial lining, glands, and turbinates.