Yes, remember, Bob Marley died of melanoma between his toes. Melanoma is from early sun exposure, I think mine started when I was 5 living in Hawaii, we moved from Oregon, that got son a couple times a year, to the tropics, no sunscreen. First week I had water blisters on my face, this where the melanoma formed.
The melanin is what gives the skin color, that is what forms into melanoma, often deep in the skin.
Squamous cell, on the other hand is cuased by mutated cells from over exsposure to UV, any cell can turn, that is why I am so concerned about the area around my previous site, where I got a skin graft from my ear. The surgeon said that even though they got it all, any adjoining cell can turn. The chemo cream is good, because it finds the cancer cells that are not even visible on the surface. This is whatitlooks like every 4 months when I “trim the hedge”: 
Froze off all the Seboria karatosis spots today, bought a block of dry ice, used a pair of needlenose pliers to hold the chunks and freez the spots. It was around $4 for the dry ice. Took a little longer then the nitrogen, as it is not as cold.
Must have froze off about 15 sites. If I have to hit it again, it is just $4…
i also cleaned my drain by crygenically freezing the gunk…
This is too funny. Also, I think, extremely dangerous!!! If you were my derm I’d be just a teeny-weeny bit scared witless. It’s still funny though. But having just remembered that I’m a mod here, I have to yell ‘Don’t Try This At Home!!’
Glad you got a good result. Might try it with the drains …
@Jon_sparky You have heard of the effect of “hyperbaric” treatment on these kind of lesions, I’m sure but in the interests of science, you should check out what hypObaric will do for it LOL and join us in our little high altitude adventure this summer. A flutist would be a great addition, Summer Bens Friends Event - You guys hear about it First! and at 9,000 ft, I’m sure we can find some crygenics as well …
I have been getting these forzen off for 40 years, so I am a expert, But ya, never try this $4 treatment, always see your Dermatologist, so she can make $400 for the same results! 
