All the advice here on adjusting mask or using padding like the microfoam tape is excellent advice, and do give these things a try.
HOWEVER, if the sore on your nose is not noticably improved during any of these experiments DO NOT CONTINUE WITH THIS MASK. Contact your DME/doctor and get a nasal interface like pillows, direct-seal, or prongs so you can get the mask off your nose and allow the sore to heal. Then try this mask again, perhaps in a different size or with padding from the onset to see if it will still work for you.
I got a red mark from my first nasal mask, no big deal, put a bandaid on it the next night and kept going. This worked for about a month, the mask was comfortable and I only had a little red mark that persisted for a few hours each morning.
Then one night I awoke to a stab of pain on my nose, and it throbbed the rest of the night. I looked under the bandaid and it only looked a little worse, but it sure it did hurt a lot.
You think I would quit? Nope, kept going, this time doubling the padding, trying tape over it first followed by padding, trying silicone putty earplugs, tried theatrical latex 'fake wound' gop, after another couple of weeks I had an angry oozing pressure sore, and my entire nose was bright red. Did I mention it hurt like a SOMBCH.
I finally got some sense and got a nasal pillows mask to use so I could let my nose heal. Even with doctor's treatment my nose took almost 3 months to heal!!! Even now my nose is still light pink, like a bit of sunburn, my doctor told me this type of redness sometimes never goes away, I may very well have a permanently pink nose now.
So please do not continue these experiments for your nose spot UNLESS you are seeing obvious improvement. Night after night of that spot having pressure applied and you may very well end up where I did, and incur permanent damage too.
I really don't care for nasal pillows so my hunt was on for a different nasal cushion. The ComfortLite 2 cushion was OK (I had been using the CL2 nasal pillows while I let my nose heal). I don't require a Full Face mask as I'm not a mouth breather, but before this wound happened I had already ordered one to have on hand for when I have a cold or other reason I can't breathe through my nose.
The FF mask I ordered is a Hans Ruldolph FF (model 7600). Well I am really liking this mask. It hits my nose in a completely different spot, and my nose is not at all sore or even red there. The mask is very very quiet, virtually silent. So far it is not leaking except in unusual situation (and I'm working on that one).
So for now I've abandoned my hunt for another nasal cushion mask and am continuing with HRFF, it might very well be my regular mask now. We'll see, I haven't had it long enough to know for sure but so far it is working out really well.
Best of luck to you with this Grump, change masks if you have to, either to let the red mark/sore heal and then try again with this mask later, or look for a different mask after your nose clears up. DON'T keep going thinking it will get better, it won't.