It sounds as if you have a post nasal drip. The best way to treat a post nasal drip is to find out what is the cause - this is usually related to hay fever or sinusitis. I suggest that you use an antihistamine and rinse your sinuses and nasal passages with salt water at least twice a day. If you feel ill or feverish, you might have infection, then I suggest that you should rather go to the doctor. Good luck.
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