sounds like actinic keratosis. the spot gets red and scaly but never fully heals right?
the problem with actinic keratosis is that it is the precursor to squamous cell carcinoma. a ery common form of skin cancer. she needs to be seen by a dermatologist. they can treat the site with liquid nitrogen and eradicate it.
the lesions don't always become skin cancer, but this is how that particular strain starts usually and the nose is a very common place because most people forget to put sunscreen there.
It is estimated that up to 10 percent of active lesions, which are more red in color and more tender than the rest, will take the next step and progress to squamous cell carcinomas.
What causes actinic keratosis?
Sun exposure causes almost all actinic keratoses. Sun damage to the skin accumulates over time, so that even a brief exposure adds to the lifetime total.
I have a small sore on my scalp , it does not heal... It bleeds.. its been a year since i had it.. after I used a hair product, that i guess burned me a little..