<s>[INST] My symtoms ARE AS FOLLOWS:  SORE TONGUE WITH FISSURES ON TOP OF TONGUE AND A GREAT DEAL OF REDNESS ON SIDES.  i'M A 71 YR. OLD FEMALE ABOUT 6 MONTHS AGO IWAS FITTED WITH A MOUTH PIECE TO HELP MY SLEEP APNEA AND SINCE THEN THE CONDITION WITH MY TONGUE HAS DEVELOPED.  DOES THIS HAVE ANY CORRELATION? [/INST] Hello and Welcome to ‘Ask A Doctor’ service.I have reviewed your query and here is my advice.I have read your query and understand your concern. As far as soreness and redness of tongue are concerned this can be due to the sharpness of appliance you have for sleep apnea or due to vitamin deficiency.For this I will suggest you a few measures Do warm saline rinses, you can apply lignocaine gel on the tongue. Eat green vegetables in your diet. Take multivitamin by consulting with the local doctor.Consult you oral surgeon for the clinical examination of mouth appliance for sharpness or surface roughness is present.Hope I have answered your query. Let me know if I can assist you further.Regards,Dr. Priyanka Tiwari </s>