It's the first thing i look for after a fresh spawn. With never being hit or damaged, I find one, use it, get sick status, sick goes away, I eat and drink, and get healthy status within minutes after the "Wounds are clean" message. I dont think its working as intended, but its the only way i've found to get my "Healthy" status even if i was never hit or scratched. I have to clean my non-existant wounds first.