Why Does My Mouth Taste Bitter?

Dry mouth

A dry mouth, also known as xerostomia, occurs when the mouth does not produce enough saliva. Because saliva helps reduce the bacteria in the mouth, having less saliva means that more bacteria can survive. People with xerostomia feel a sticky, dry feeling in their mouth. This could be caused by factors such as medications, pre-existing disorders, or tobacco use. A person can also get dry mouth if they have a stuffy nose because breathing through the mouth can dry it out.