I have a 14-year-old son. He had excessive drooling when he was an infant. Now days, he has dry coughs and spits constantly. According to him, he said that he felt there is something stuck in his throat. Therefore, he tries to cough it out and spit it out. Is this allergy related symptom? One of his dentist said that he might have tonsilitis and recommended him to use mouth wash frequently. Since then, my son has been using mouth wash a couple of times a day. He likes to use it. But it didn't make the symptom go away. Please help.