What term describes a condition that happens repeatedly or occurs over and over again?

The term "recurrent" specifically refers to conditions that occur repeatedly or come back after a period of time. It emphasizes the cyclical nature of the condition, indicating that it isn't just a one-time occurrence. For example, recurrent headaches can manifest multiple times over a span of days, weeks, or years, highlighting this pattern of return.

In contrast, "intermittent" suggests an irregular pattern of occurrence with breaks in between episodes rather than a consistent return. "Chronic" refers to long-lasting conditions that are ongoing but does not necessarily imply they repeat frequently. "Continuous" indicates something that happens without interruption, lacking the aspect of recurrence. Thus, "recurrent" is the most appropriate term when describing conditions that happen repeatedly.