There are many different masks to choose from. There are full face mask, nasal masks and nasal pillows. Patients that have hard time breathing thru their nose only may have to try a full face mask at time. Although any mask may feel somewhat uncomfortable to you, the goal is to feel comfortable enough to wear the therapy efficiently. This includes comfort and providing a good seal. It is recommended to have a mask fitting with a therapist to allow you to get a feel of the mask, tried at prescribed pressure to see if you are able to tolerate and make an informed decision.