The F20 has a foam seal so the silicone shouldn’t touch your skin but during sleep you move and the silicone area of the mask touches your nose. This results in a sore spot on the bridge of your nose.

@moesilverio, questions about the seal of the CPAP mask, irritation or sore spots on the nose from the mask and silicone allergies are common issues that CPAP wearers ask at the Mayo Clinic Store - Sleep Apnea, where they fit people with masks. Here's information they provided to your concerns:

"A tender spot on the bridge of the nose is usually exacerbated by loosening the mask because it allows for more movement in the mask. If the mask is loose it will cause excessive vibration/rubbing. When this happens your device then sends a signal from the machine 3 times a second to determine what you are doing.

Silicone allergy is not an unheard of issue. Different manufacturers use different chemical makeup for their masks. You may wish to start with a different manufacturer. There are even cloth masks available. At the Flower of Hope, we commonly suggest a different mask with a more supportive cushion and a cloth barrier.

Regarding creams, it’s advised not to use a cream unless prescribed by a dermatologist. Most creams under the pressure of the mask can actually embed under the skin in the vascular bed and cause a bacterial infection making the situation much worse.

Moe, have you looked into a cloth mask? What did you learn from your pulmonary doctor?