OLD CARTS stands for Onset, Location, Duration, Characteristic, Alleviating and Aggravating factors, Radiation (or Relieving factors), Timing, and Severity. It’s a mnemonic used in healthcare to systematically assess a patient’s pain or symptoms during a medical interview. Whether you’re a nursing student memorizing it for an exam or a patient who spotted it in your chart, here’s what each letter means and why it matters.
Each Letter Explained
O (Onset) refers to when and how the complaint began. Did the pain start suddenly while you were lifting something, or did it creep in gradually over several days? The circumstances around the very first moment of a symptom can point a clinician toward certain causes and rule out others.
L (Location) asks where exactly the pain or symptom is. This goes beyond “my stomach hurts.” A provider wants to know the specific body part, whether the discomfort is in one pinpoint spot or spread across a broader area, and whether you can point to it with one finger or need to wave your whole hand.
D (Duration) covers how long the symptom has been present and how often it occurs. A headache that started 20 minutes ago tells a very different story than one that’s been coming and going for six weeks.
C (Characteristic) is about the quality of the pain. Providers often ask patients to pick a word that fits: achy, dull, stabbing, sharp, throbbing, squeezing, itching, or burning. These descriptors aren’t just colorful language. A squeezing chest pain suggests something different than a sharp, stabbing one, and the right word can steer the entire evaluation.
A (Alleviating and Aggravating factors) explores what makes the symptom better or worse. Resting, taking over-the-counter pain relief, applying ice, or lying in a certain position might ease it. Walking up stairs, eating certain foods, or changing body position might intensify it. These details reveal patterns that help narrow down a diagnosis.
R (Radiation or Relieving factors) asks whether the pain travels. A backache that shoots down one leg, or chest pain that spreads to the jaw and left arm, behaves differently from discomfort that stays put. Some versions of the mnemonic use “R” for relieving factors instead, which overlaps with the “A” category above.
T (Timing) looks at the pattern of the symptom over time. Is the pain constant, or does it come and go? Does it show up only in the morning, after meals, or during exercise? A pain that wakes you at 2 a.m. every night carries different implications than one that flares randomly throughout the day.
S (Severity) puts a number on it. Patients are typically asked to rate their pain on a scale of 1 to 10, with 10 being the worst pain imaginable. This gives providers a quick baseline and a way to track whether a treatment is actually helping over time.
Why the Mnemonic Exists
Pain is subjective, and describing it clearly under the stress of a medical visit is harder than it sounds. OLD CARTS gives clinicians a structured checklist so they don’t miss important details, and it gives patients a framework for organizing what they’re feeling. A multidimensional assessment like this provides far more diagnostic insight than simply asking “Where does it hurt?” and “How bad is it?”
The information gathered through OLD CARTS typically ends up in the “History of Present Illness” section of your medical record. When you see a specialist or visit the emergency room, that structured description travels with you, so the next provider doesn’t have to start from scratch.
How to Use It as a Patient
You don’t need to memorize clinical mnemonics to benefit from this. But if you’re heading to an appointment for a new or worsening symptom, walking through each letter beforehand can help you communicate more effectively. Before your visit, think through these questions:
- When did this start, and what were you doing? (Onset)
- Where exactly is the pain? (Location)
- How long does each episode last, and how long has the problem been going on overall? (Duration)
- What does it feel like: sharp, dull, throbbing, burning? (Characteristic)
- Does anything make it better or worse? (Alleviating/Aggravating)
- Does the pain spread or travel anywhere else? (Radiation)
- Is it constant, or does it come and go in a pattern? (Timing)
- On a scale of 1 to 10, how bad is it at its worst? (Severity)
Writing down your answers before an appointment saves time and ensures you don’t forget key details in the moment. It also helps your provider move more quickly toward the right tests or treatments.
Similar Mnemonics You Might See
OLD CARTS isn’t the only tool of its kind. OPQRST (Onset, Provocation, Quality, Region, Severity, Time) and SOCRATES (Site, Onset, Character, Radiation, Associations, Time course, Exacerbating/relieving factors, Severity) cover much of the same ground with slightly different groupings. COLDERAS is another variant. They all aim to do the same thing: ensure that every important dimension of a symptom gets explored rather than overlooked. The core categories, including onset, location, character, severity, and what makes it better or worse, appear in nearly all of them.
If you’re studying for an exam, pick the one your program uses and practice applying it to case scenarios. The letters are just a memory aid; what matters is building the habit of asking thorough, systematic questions about any symptom a patient presents.