Re: Thick Mucus stuck to back of throat?

You can try some of the following remedies

• Use a Neti pot, which can help flush out mucus. 
• Apply warm compresses to your face to relieve pain from sinus pressure.
• Sleep with your head elevated to prevent mucus buildup.
• Boil water and cover your head with a towel to inhale the steam.
• Drink plenty of water, especially warm water and tea.
• Try a hot toddy: mix hot water, a shot of whiskey, fresh lemon, and honey. Some research suggests that this beverage can help relieve congestion.
• Drink herbal tea, not only can it help break up mucus, but you can inhale the steam, too.

Also there can be many reasons for your thick mucus. You can check this article for more information.