heard a lot of ulcers on old people, diabetics, and things like skin wounds on burn victims, radiation burns, skin grats, etc they use hyperbaric chambers to help heal those hard to treat skin wounds. they often just put an air tight boot on peoples legs and pump that air onto the effected area, not everyone needs to go into a full chamber. maybe look into that, see if any hospitals/clinics near you do this stuff.
https://www.hopkinsmedicine.org/health/treatment-tests-and-therapies/hyperbaric-oxygen-therapy-for-wound-healingand i saw some anon saying it might be skin cancer, but you never know. it might be something simple it might be something dangerous. sp yeah you should definitely meet with a dermatologist over it.
