Function;

1. Constant need to clear your throat,

2. Feeling that your throat is blocked,

3. Blocked or stuffy nose that you can't clear,

4. Runny nose, feeling of mucus running down the back of your throat,

5. Persistent cough, headache or facial pain,

6. Reduced sense of smell and taste,

7. Crackling sensation in your ear and some temporary hearing loss.