What Kind of Doctor Do I Need? Slideshow Dental (Oral) Health Quiz Causes of a Heart Attack Slideshow Subacute: Rather recent onset or somewhat rapid change. In contrast, acute indicates very sudden onset or rapid change, and chronic indicates indefinite duration or virtually no change. From Healthy Resources When Prostate Cancer SpreadsHow Well Are You Living With AS?Protecting Your Immune System Featured Centers How Is Your MS Care Routine? Assess Yourself Health Solutions From Our Sponsors Kept Your Wisdom Teeth? What is TAVR?