Post nasal drip is basically just mucus. So with spring allergies you tend to notice-- basically, it's your body's reaction to something foreign. So when you produce a little too much mucus then ...

Sinusitis is an infection that causes the sinuses to become inflamed, swollen and filled with mucus. Among other symptoms, sinusitis can cause post nasal drip with thick, dark-colored mucus or phlegm.

Your sinuses work as a filter, creating mucus that drains around ... This can lead to symptoms like nasal congestion or discharge, post-nasal drip, headache, and pressure around your eyes ...

Take a steamy shower: If you’re struggling to breathe or falling asleep, consider taking a warm, steamy shower before bed. The steam helps loosen mucus, which can make it easier to breathe and reduce ...