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The tongue papillae, including the taste buds, can become inflamed. A sore tongue is not always a sign of something more serious. The tongue should be included in good dental health habits. Over time, smoking can make the tongue more sensitive to heat and cold.
Re: tingly lips and tongue. tingly lips and tongue is also a very common symptom of anxiety. Similar to the tingles you may feel on your skin during anxious time, the same can happen to lips and tongue. All to do with either over breathing or under breathing. Once any other possibilities are ruled out by your doctor, no need to worry about it.