Hi.. Thanks for the query.. As per your query Yes it is true that in case if there is inflammation of gum flap over the erupting wisdom tooth known as Pericoronitis due to which there is tenderness and pain, the pain can radiate to throat causing sore throat and inflammation in throat and due to Pericoronitis only there is swollen lymph nodes under the jaw.. You can take a course of antibiotics like Amoxicillin 5OO mg three times a day. Ibuprofen 4OO mg three times a day, Pantoprazole 4Omg once in the morning empty stomach and all these has to be continued for 5 days.. Along with this doing warm saline gargles and cold compresses over the swollen area over the face will help.. Maintain a proper oral hygiene and do not let food accumulate in the area of erupting wisdom tooth.. If still the inflammation does not subside consult a dentist and get evaluated as in a few cases the gum flap has to be removed by a minor surgical process known as Operculectomy.. Hope this helps.. Thanks and regards..