Skin fissure

A skin fissure is a cutaneous condition in which there is a linear-like cleavage of skin, sometimes defined as extending into the dermis.[1] It is smaller than a skin laceration.

Schematic image comparing a skin fissure to an erosion and an ulcer.
The surface of the knuckles of a hand with xeroderma, showing skin cracking (generalized skin fissuring).

Generalized

A skin area on which there are many skin fissures is called cracked skin, and is most commonly a result of skin dryness. Ichthyosis is a genetic disorder where there is often severe skin cracking.

gollark: https://isotropic.org/papers/chicken.pdf
gollark: https://media.discordapp.net/attachments/629419596428083210/777242606102380574/unknown.png?width=427&height=422
gollark: You'd have to keep decreasing it for every repost though.
gollark: I didn't. Depending on how it gets split into blocks or something it might work.
gollark: Based on something or other it runs on perceptual hashes which use a discrete cosine transform thingy, so it might be easiest to DCT the image data, fiddle with the parameters a bit, and convert it back.

References
  1. Primary Care Dermatology Module > Nomenclature of Skin Lesions > 18. FISSURE By Gary Williams, M.D. and Murray Katcher, M.D. Ph.D, Department of Pediatrics. The University of Wisconsin


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