The tongue is a bit hard after a piece of flesh grows from the teeth, usually due to papillitis, mucous gland cysts, tissue hyperplasia and other reasons. 1. papillitis of the tongue: papillitis of the tongue is usually caused by vitamin deficiencies, fungal infections, etc., resulting in the tongue being bitten by the teeth and a piece of flesh grows well a little hard. 2. Mucous gland cysts: Mucous gland cysts are usually caused by trauma, after the tongue is bitten by the teeth to pick up a piece of meat, resulting in mucous gland excretory ducts are blocked to form cysts, and there is a bit of hardness after the tongue is bitten by the teeth to restore the situation. 3. Tissue hyperplasia: tissue hyperplasia is generally due to an increase in the number of epidermal cells, the tongue is bitten by the teeth after a piece of flesh, may lead to the tongue mucosal tissue hyperplasia, the tongue is bitten by the teeth after a piece of flesh grows well a little hard symptoms. It is recommended that patients go to the hospital in time for examination and treatment.