an area of inflammation in the throat or nasopharynx can mimic a foreign body sensation but pieces of food or even a hard lump of mucous can do this as well. you may not be able to see a source on a self-examination but your medical provider may be able to answer this question by examining you.
feels like something is stuck behind uvula. causes coughing and clearing of throat but still have feeling. had a cold cold went away but now this non-stop feeling of having something stuck behind uvula. throat looks fine i feel fine except for feeling that something is stuck in my throat.