A. It could be one, or a combination of things. Contact your local branch to have a respiratory therapist look at the data from your CPAP machine and see if the settings and therapy are appropriate and/or working as expected. Another thing to consider is whether your sinuses become frequently congested when lying down, or if your mouth opens when you fall asleep. If these two things are occurring, you may need to change to a full face mask. Although a full face mask may not be your first choice, your breathing will be more natural and you will most likely get better results from your therapy with a full face mask.

