7. Gastroesophageal Reflux Disease (GERD)
GERD is a condition that often leads to acid reflux, also known as heart burn. GERD can also lead to dysphagia or difficulty swallowing, resulting in excess salivation and drooling while sleeping. This is another important condition that does have a solution, so speak to your doctor if you have frequent heartburn and are drooling while sleeping.