Cracks on the tongue and map lines, according to the description of most of the map tongue and furrowed tongue, may be associated with genetic, immune, mental, and systemic diseases.
Cracks on the back of the tongue can be seen in furrowed tongue, the back of the tongue has long or short deep furrows and parafurrows, may be associated with systemic systemic diseases aspergillosis, diabetes mellitus, vitamin deficiencies, syphilis or viral infections, heredity, and furrowed tongue is often accompanied by maps tongue.
Map tongue occurs on the dorsum of the tongue, the tip of the tongue, the edge of the tongue, filiform papillae thickening and the surrounding mucosa to form a clear demarcation, expanding to map-like, may be related to heredity, nutritional deficiencies, stress, immune disorders.
It is recommended to seek timely medical treatment for abnormal tongue morphology and color, so as not to affect the health of oral tissues.