Changes

===Pathology===

===Pathology===

Starts as hyperaemia and oedema of [[Oral Cavity - Tongue - Anatomy & Physiology|tongue]] or pharynx with mucoid exudate on surface.

Starts as hyperaemia and oedema of the [[Oral Cavity - Tongue - Anatomy & Physiology|tongue]] or pharynx with mucoid exudate on the surface.

Lymphoid follicles on the [[Soft Palate - Anatomy & Physiology|soft palate]] may enlarge and proliferate.  

Lymphoid follicles on the [[Soft Palate - Anatomy & Physiology|soft palate]] may enlarge and proliferate.  

Often see white spots due to epithelial hyperplasia and increased mucous secretion, these can be scraped off to leave ordinary mucosa underneath.   

Often see white spots due to epithelial hyperplasia and increased mucous secretion, these can be scraped off to leave ordinary mucosa underneath.