A cracked tongue may be a sign of a grooved tongue, which can usually be left untreated if there are no symptoms. If it is symptomatic, pain relieving medications such as 0.5% dacronin, 2% lidocaine, 1% procaine, etc. can be used. For the surface of the cracked tongue, you can brush the tongue with a soft-bristled toothbrush to avoid the accumulation of food residues and bacteria in the tongue groove. Local treatment is based on anti-infection, and you can use chlorhexidine gargle and sodium bicarbonate for gargling to ensure oral hygiene and tongue hygiene. If there is a vitamin deficiency, you can also supplement vitamins and trace elements.