I have enlarged tonsil that is red and swollen whenever i eat spicy food my right side throat and tongue burns i have an erupting right side third molar too, today my tonsil is irritated and burning and its even swollen what is the reason?

Most likely a viral tonsillitis but need to see to better evaluate. Let someone look in there and examine you.

An infected eruption crypt around a third molar will be drained to the tosil and the submandibular glands so it is quie understandable that you would be having problems. You need to have the problem treated, please see your dentist, and I would stay off the spicy foods if you can.

Too many reasons for tonsil inflammation to list here. A physical examination and medical history is required to establish a diagnosis. That is best done in person rather than virtually. This is a general information site, not an individual diagnosis site. Don't eat spicy foods until you can see a General Physician or preferably a specialist Otolaryngologist (EENT).