It is natural and associated with the tongue and lips getting used to previous conditions. Fortunately, man has excellent adaptation skills and after a few days he gets used to the prosthesis. Of course, at the last visit related to prosthetic treatment the doctor will recommend follow-up visits in order to make corrections to the supplement. If, however, before the date of the follow-up visit, the symptoms are significant, or on the mucous membrane appears pressure ulcers, you should immediately consult your physician.