An untreated anal fissure can sometimes develop into a fistula. Learn how this happens, who's at risk, and what treatment looks like for both conditions.
Cutaneous lupus can progress to systemic lupus in some people. Learn what the research says about risk factors, warning signs, and how to reduce your chances.
Glacial acetic acid gets its name from its tendency to freeze into ice-like crystals at cool room temperatures — here's what that means for its chemistry.