<s>[INST] My 2 year old Siamese comes down with upper respiratory infections constantly. He has been examined for nasal polyps and nothing was found. He seems to have a very small opening in the back of his throat - almost like there is a webbing in the back of his mouth that makes the opening very small. He also regularly chews on the back of his tongue, almost like it doesn t quite fit his mouth, is getting caught on the webbing at the back of his throat, or maybe that his tongue is blocking the very tiny opening to his throat. Does anyone know what this webbing is (it looks like the thing under your tongue, called frenulum)? Could it be contributing to him constantly battling URI s?? [/INST] Hello,Frequent upper respiratory infection (URI) occurs during seasonal change is a normal thing. However, if it is very frequent, the child may allergic rhinitis, adenoids, and sinusitis also, so you need to work up for the same. Allergy panel test should plan, throat examination by your pediatrician.Hope I have answered your query. Let me know if I can assist you further.Regards,   Dr. Sachin Kumar Agarwal </s>