I have been waking up with a sore throat for the past week. soreness goes away after an hour. experience cough with green mucus/blood rest of the day.

Home furnace: It's winter in North america and most of the homes north of Santa Barbara have their heaters on during the night as is gets colder. I grew up in LA and didn't know what a humidifier was until I moved to St. Louis, Missouri. Get a humidifier. If your nose is stuffy and you are breathing thru your mouth then you'll find yourself waking up with a sore throat, which goes away after being up awhile.