It’s called dry because that’s what we call it when a body part turns black and cellular death is caused by blood being cut off. It’s called wet when it’s because of a bacterial infection. Wet spreads, dry doesn’t. Dry can become infected and turn to wet, though.
Oops! Sorry, I missed that one. “Occlusion” means “blocked” or “cut off”, that’s all. So if the blood is cut off, say, at the bed of the fingernail, but it’s getting through up until that point, the finger will turn black from the bed of the fingernail to the tip. Unless something else happens to cut off - occlude - the blood closer in, the black won’t spread.
(Thanks for asking…I’m still learning how to educate patients, and sometimes I forget what is “medicalese”.)
That, I don’t know. I think it’s one of those “it depends” things. It depends on how generally healthy the person is. It depends if what caused the blood to stop flowing there and if that’s been corrected. It depends on whether it was just the teeny-tiny capillaries that were cut off, or if it was the larger vessels. It’s easier for your body to reroute and make new capillaries than big blood vessels.
If it’s a medical condition that’s caused it, like diabetes or peripheral vascular disease, then you should follow your doctor’s instructions about medication, diet and exercise, wearing special socks if she says you should, elevate the limb as directed, etc.
In the case of plague, um…don’t reach in the mouth of a stray cat to fish out a mouse, I guess. Ick. Poor guy. (Poor cat.)
It’s easier to prevent these things than to treat them once they happen. Often there’s not much that can be done other than amputate and teach the patient how to better manage their disease to try to prevent it happening again to another body part.
It will get bigger. The edges may look swollen, red, maybe have puss, yellow or green gunk oozing out, feel hot to the touch, maybe have red streaks working their way up your hand. Red streaks are bad. If you have *any *cut or scrape that gets red streaks, that’s an ER visit, not a “see your doctor in the morning” visit.
They’re going to be watching this guy pretty closely, believe me.