Maam please upload an image of the offending tooth . Burning throat and tongue can be due to Candidiasis ,leukoplakia    mostly have difficulty in having spicy foods    ,cant judge without seeing the inta oral image   please upload a photo . Betadine mouthwash in luke warm water .

Go for opg xray

Its very rare that a decayed tooth causes specially recurring pharyngitis. Tab vizylac twice a day Tab limcee twice a day Preferably betadine rinses 3-4 times a day if not then warm saline rinses 4-6 times a day

Yes definitely it can better you take a course of antibiotics before it flares up if your dentist is available get the tooth treated . Take care

No,decayed tooth has no correlation with a pharyngitis but yes it may radiate the pain in that area ,

Pain may radiate to pharynx sometimes due to decayed tooth pain. no other symptoms can be associated with decayed tooth. Burning sensation of throat/tongue and mouth itching can be associated with chronic acidity(have food every 2 hours and Rx Tablet Rabium DSR, once a day before food) or tobacco smoking/chewing habit(if any,  quit immediately) . Poor maintenance of oral hygiene. Brush 2 times/day,after food. Drink water 2.5 litre/day. T. Limcee,  twice a day,  after food for 15 days Locally apply, hexigel ointment, 3-4 times/day,for 5 mins and rinse. Do not swallow saliva. Avoid hot spicy hard food.

Decayed tooth can't cause phayngitis Consult ENT for medication Eat soft semi solid food like soups,daal ,khichdi Don't do Gargles Don't take anything cold