HI,
Dry mouth can be a side effect of many drugs like
Pristiq for depression. Smoking
or chewing tobacco can affect saliva production and aggravate dry mouth. Continuously breathing with your mouth open can also contribute to the problem. It can be due to conditions that lead to dehydration, such as fever, excessive sweating, vomiting, diarrhoea, blood loss, and burns can cause dry mouth. Dry mouth can be due to medical conditions like diabetes, thyroid problems, anaemia, cystic fibrosis.