In the morning, I have white deposits on my lips (semi-liquid, semi-solid). My tongue can't remove them, I have to scrape them off with my nails. Also, my mouth feels pasty. What is this and how can I fix it?

The white deposits on your lips could be caused by a sinus infection, which may be leading to nasal congestion and mouth breathing during the night. This could dry out your mouth and lead to the buildup of semi-liquid or semi-solid deposits. Treating the sinus infection should help resolve this issue. Make sure to keep up with your oral hygiene routine as well.