Generally, people wake up in the morning having an awful taste in their mouth even when brushing and seeing dentist on a regular basis. problem here?

AM Bad Taste Causes: A bad taste in the AM may be caused by many different factors, such as; mouth breathing, post nasal drip, sinus issues, acid reflux, decreased salivary flow, certain medications, and a variety of medical concerns. It's important to determine the underlying factor causing this bad taste in order to treat it and relieve your symptoms. Your dentist and/or physician can help to determine the cause.