In ancient times

miasmic diseases were mainly prevalent in Lingnan area. There is a distinctive Lingnan miasmic disease theory in traditional Chinese medicine including etiology of miasma and pathogenesis of miasmic damp. Miasma including miasmic toxin and miasmic fog is the main etiology of miasmic pestilence and common miasmic diseases

and the main pathogenesis was miasmic damp. Miasmic disease theory has a certain impact on disease prevention and treatment in Lingnan Medicine. Miasmic disease theory contains unique geographical pathogenesis. It is worthy of pursuing and can be the foundation of modern Lingnan Medicine theory.