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 ...

You may notice nasal discharge or mucus that's thick and yellow or green. This discharge can ... Your sore throat can sometimes also worsen due to post-nasal drip. This continuous drip of mucus ...

Symptoms include a post-nasal drip, stuffiness, sinus pressure, facial pain, and frequent nosebleeds. It sounds like it could still be just a cold, but if these symptoms last more than 10 days ...