Chronic
Long-lasting or persistent, conventionally three months or more.
What it means
Chronic means long-lasting, conventionally three months or more. From the Greek chronos, time.
As with acute, the word says nothing about severity. Chronic conditions range from trivial to life-limiting, and the colloquial use of "chronic" to mean terrible is a source of unnecessary alarm when people read it in their own notes.
Many chronic conditions are managed rather than cured — which is not a failure of treatment but the nature of the condition.
In practice
"Chronic kidney disease stage 3" sounds severe and frequently is not; it is common with age and often stable for decades.
Chronic pain is now recognised as a condition in its own right rather than simply a prolonged symptom, and is treated differently as a result.
Why it matters
A new or changed symptom in someone with a chronic condition should not be attributed to that condition by default. This is diagnostic overshadowing, and it is a well-documented cause of delayed diagnosis.
Long-term condition reviews exist to check that treatment still fits, that monitoring is up to date, and that medicines started years ago are still needed.
Clinically reviewed by Dr Mohammad Zubair Khan, GMC 7563469
Last reviewed
August 30, 2026