Why are your saliva coloured brown every morning you woke up?

Brown saliva in the morning can be caused by several factors, including dehydration, dry mouth, or the presence of blood, which may indicate oral health issues like gum disease. It can also result from the breakdown of red blood cells or the accumulation of food particles and bacteria overnight. If this persists or is accompanied by other symptoms, it's advisable to consult a healthcare professional for a proper diagnosis.