Moving pattern of papillae
The surrounding edge looks a grey white colour but this varies from patient to patient. This case could be mistaken for median rhomboid glossitis, which is a manifestation of candida, but thrush plays no part in geographic tongue. It gets its name from the moving patterns of papillae loss.
It is linked to vitamin B or zinc deficiency, stress, hormonal factors, diets high in sugar or processed foods, and psoriasis.