Why Does Pain Feel Different?

A patient tells you their pain is 7 out of 10. You have a number, but you still know very little about the pain.

Now imagine they add, “It feels like a deep ache in my thigh.” Another patient says, “Mine burns, then I get these electric shocks into my toes.” Someone with abdominal pain tells you, “It grips really hard, eases off, then comes back again.” All three people are in pain, but they are describing very different sensations.

Those words are not just different ways of saying something hurts. They can give you clues about the tissues and systems involved, how the nervous system may be responding and, most importantly, what you need to ask next. A pain score tells you about intensity. The way the patient describes the pain starts to tell you about the experience itself.

Why can pain ache, burn or shoot?

To understand why pain feels different, it helps to understand what has to happen before we experience it.

Imagine you injure the muscles in your calf. Potentially damaging mechanical, thermal or chemical stimuli can activate specialised sensory receptors called nociceptors. These receptors convert the stimulus into electrical activity that travels along peripheral sensory nerves towards the spinal cord. From there, information is transmitted and processed through the nervous system, including areas of the brain involved in sensation, attention, emotion and meaning.

The neural process of detecting and encoding a potentially damaging stimulus is called nociception. Nociception and pain are related, but they are not the same thing. The International Association for the Study of Pain (IASP) defines pain as an unpleasant sensory and emotional experience associated with, or resembling that associated with, actual or potential tissue damage. It also emphasises that pain is a personal experience influenced by biological, psychological and social factors.

That distinction matters clinically. Pain is not simply a read-out of how much tissue damage exists. You cannot look at an X-ray, wound, scan or observation chart and know exactly how much pain somebody should be experiencing. Previous experiences, anxiety, expectations, sleep, illness, environment and many other factors can influence the experience, without making the pain any less real.

It also explains why two patients with apparently similar injuries may use completely different language. One may call the sensation a dull ache. Another may say it is sharp whenever they move. The patient's description is therefore part of the clinical information, not an optional extra.

One useful way to make sense of those descriptions is to think about the system involved rather than trying to memorise a list of adjectives. Nociceptive pain occurs when nociceptors are activated by actual or threatened damage to non-neural tissue. This includes pain arising from skin, muscles, bones, joints and internal organs. Pain from skin and musculoskeletal structures is often described as somatic pain, while pain arising from internal organs is visceral pain. They can feel quite different because the sensory information originates from different tissues and is represented differently within the nervous system.

Neuropathic pain is different. Here, the pain is caused by a lesion or disease affecting the somatosensory nervous system itself. A patient may describe burning, shooting or electric-shock-like pain, sometimes alongside tingling, numbness or altered sensation. Those descriptions can make you consider a neuropathic component, but they do not diagnose neuropathic pain by themselves. The history, examination, anatomical distribution and evidence of a relevant nervous-system lesion or disease all matter.

There is also nociplastic pain, where pain arises from altered nociception without clear evidence that it is fully explained by tissue damage activating peripheral nociceptors or by a lesion or disease of the somatosensory nervous system. These mechanisms are not always separate boxes. A person can have more than one pain mechanism at the same time, particularly in persistent or complex pain.

Listen to the words, then ask what they mean for this patient

Think about the difference between an ache in a shoulder and an electric sensation running into a foot.

Patients with musculoskeletal pain may use words such as aching, sore, tender, heavy or deep. A deep muscular ache can feel as though it sits inside the limb rather than on the surface. The patient may notice it more when the muscle is used, stretched or pressed, but that pattern depends on the cause.

Suppose Daniel tells you, “It’s a deep ache in my shoulder and it catches when I lift my arm.” The word ache is useful, but the next part of his sentence is just as important. Movement changes the pain. That should make you curious. Which movement reproduces it? Is the shoulder tender or swollen? Is movement restricted because of pain, weakness or both? Was there an injury? Is the pain present at rest? Can he wash, dress or reach for something in the way he normally would?

This is where pain assessment becomes nursing assessment. Pain affects function. A patient who rates their pain as 4 out of 10 but cannot take a deep breath, mobilise safely, sleep, eat or complete basic activities may have a significant clinical problem that the number alone does not capture.

Now change Daniel's description. He says, “My foot feels as though it’s burning. Every so often I get an electric shock into my toes and part of the foot feels numb.”

Burning, electric-shock-like and shooting sensations are commonly associated with neuropathic pain. The accompanying numbness adds another piece of information. Numbness itself is not a type of pain. It describes reduced or altered sensation, but it can coexist with pain when the somatosensory nervous system is affected.

Now you need a different set of questions. Where does the sensation begin? Exactly where does it travel? Is the same area numb or tingling? Does the skin feel unusually hot or cold to him? Has he noticed weakness? Has his walking changed? Is there a relevant history such as diabetes, shingles, spinal disease, surgery, trauma or another condition that could affect the nervous system?

Distribution matters. “It shoots down my leg” contains more clinical information than the word shooting alone. Pain travelling in a particular anatomical pattern may raise different possibilities from poorly localised pain that seems to spread across a whole limb. As a student nurse, you are not expected to diagnose the cause from a pain description. You are expected to notice what is significant, assess within your competence and communicate or escalate findings appropriately.

Some patients describe another unusual sensory experience: ordinary touch hurts. Clothing may feel painful against the skin, or a bedsheet resting over a foot may be difficult to tolerate. Pain produced by a stimulus that would not normally provoke pain is called allodynia. This is different from hyperalgesia, where a stimulus that would normally hurt produces an increased painful response.

If a patient pulls away when you lightly touch an area, documenting only “tender” may lose useful information. Ask what the touch actually feels like. Where clinically appropriate and within your competence, comparing sensation with an unaffected area may help identify a sensory change. Allodynia and hyperalgesia are findings, however, not diagnoses. They still need to be understood alongside the rest of the patient's presentation.

Deep, gripping and difficult to point to

Pain arising from internal organs creates a different problem. It is often harder for the patient to localise precisely, and the language may be less specific.

Imagine you are assessing Amira, who has abdominal pain. Instead of pointing to one small area, she places her hand across her abdomen and says, “It’s somewhere in there. It grips really hard, then eases off. A few minutes later it builds again.”

This is visceral pain, pain arising from internal organs. Compared with pain from skin or some musculoskeletal structures, visceral pain can be diffuse and difficult to localise. Patients may describe it as deep, squeezing, pressure-like, cramping or aching. It can also be accompanied by autonomic responses such as nausea, sweating or pallor.

Amira has told you something important without using any medical terminology. Her pain changes over time. It builds, becomes intense and then eases before returning. Pain that occurs in waves may be described as colicky. Colicky pain can occur when a hollow organ contracts against an obstruction, including within the urinary or biliary tract. The description does not tell you the diagnosis, but it tells you that timing deserves attention.

So you keep listening. Does the pain disappear completely between episodes or simply lessen? How long does each episode last? Is she nauseated or vomiting? Has she noticed urinary or bowel changes? Where did the pain begin? Has it moved? Is she able to keep fluids down? What do her observations show? What does she look like while the pain is occurring compared with when it settles?

Now imagine Amira simply said “8 out of 10” and nobody asked anything else. Almost everything clinically useful about the pattern would have been lost.

Visceral pain also helps explain why the place a patient feels pain is not always the place where the problem originates. Sensory information from internal organs and somatic structures can converge within the central nervous system. Pain can therefore be perceived in an area away from the structure producing it. This is referred pain.

Cardiac ischaemia is an important example. A patient may experience central chest discomfort, but symptoms can also spread to the arms, neck, jaw, stomach or back. The patient may not use the word pain at all. They might say their chest feels heavy, tight, squeezed, pressured or burning, or describe something that feels like indigestion.

That is an important lesson in how we ask questions. “Are you in pain?” can invite a yes or no answer. A patient who thinks of pain as something sharp or severe may genuinely answer no while still experiencing significant pressure or heaviness. Asking about pain, pressure, heaviness, tightness or discomfort gives them more room to describe what is happening. The description must then be considered alongside associated symptoms, observations, history and the overall clinical picture.

What does the description make you do next?

The point of learning pain language is not to turn adjectives into diagnoses. It is to improve the next part of your assessment.

If somebody describes a deep ache, you may want to understand its relationship with movement, position, palpation, injury and function. If they describe burning or electric shocks, you may explore sensory change, weakness and the anatomical distribution. If the pain is gripping and comes in waves, timing and associated visceral symptoms become particularly useful. If someone describes pressure or heaviness in the chest, the context and associated symptoms may make rapid assessment and escalation necessary.

The same descriptor can also mean different things in different patients. Burning pain can occur with neuropathic pain, but a patient may also use burning for irritated skin, mucosal discomfort or chest symptoms. Sharp pain can occur in many different conditions. Throbbing can be used for headache, inflammatory pain, dental pain or an injured digit. This is why the safest question after hearing a descriptor is rarely “Which diagnosis does that word mean?” It is “What else is happening with this pain?”

Look at the whole pattern. Site tells you where the patient feels it. Onset tells you how and when it began. Character gives you the patient's own description. Radiation explores whether it travels. Associated symptoms may reveal important accompanying features. Timing tells you whether it is constant, intermittent, progressive or episodic. Exacerbating and relieving factors show what changes it. Severity tells you how intense the patient experiences it.

Those prompts form SOCRATES, but the acronym should support the conversation rather than control it. A patient in pain does not need an examiner firing eight questions at them in acronym order. You can obtain the same information naturally: “Show me where it hurts. When did it start? What does it feel like? Is it there all the time or does it come and go? Does it move anywhere? What makes it worse? What helps? What else happens when the pain comes?”

Then widen the assessment. What are the patient's observations? What is their relevant history? What medication have they already had, and did it help? Can they mobilise, cough, breathe deeply, eat, sleep or perform normal activities? Has the pain changed suddenly? Are there new neurological symptoms? Does the presentation fit what you expected, or is something different?

Pain assessment should also lead to reassessment. If an intervention is given, whether pharmacological or non-pharmacological, return to the patient. Has the intensity changed? Has the character changed? Can they now move or breathe more comfortably? Has an associated symptom resolved or appeared? A repeat number without asking how the patient is functioning can still miss the point.

A pain score is only one part of the story

Numerical rating scales are useful. They give the patient a way to express intensity and can help you monitor change over time. If someone reports pain as 8 out of 10 before an intervention and 3 out of 10 afterwards, that change is clinically useful.

But the number is subjective, and that is not a flaw in the assessment. Pain itself is subjective. A 7 out of 10 belongs to the person reporting it. It should not be adjusted in your head because the patient is talking calmly, using their phone, smiling with a relative or does not look the way you expected somebody in severe pain to look.

Behaviour can contribute to assessment, particularly when a patient cannot self-report reliably, but appearance should not be used to invalidate a person's account. Pain expression varies between people, cultures, situations and previous experiences. The purpose of the score is to communicate the patient's reported intensity, not to test whether they can perform pain convincingly.

Documentation is where all of this becomes visible to the rest of the team. Compare:

Pain 7/10.

with:

Reports intermittent burning pain beginning in the right buttock and travelling down the posterior leg into the foot, with tingling in the foot. Worse when sitting and coughing. Rates pain 7/10.

The second entry does not diagnose the patient. It simply records what was actually found. Another clinician can see the character, distribution, timing, associated sensory symptom, provoking factors and intensity. If the pain changes later, there is a meaningful baseline to compare it with.

Good documentation also records what you did and what happened afterwards. If analgesia was administered, record it according to local practice and reassess its effect. If a concerning feature was identified, document the escalation and relevant response. If pain is preventing mobilisation, breathing exercises, sleep or other care, that functional impact is worth communicating too.

Back to the patient

Return to the patient who told you their pain was 7 out of 10. This time, instead of stopping at the number, you ask them to describe it.

They tell you it is a burning pain that begins in the lower back and shoots down the back of the right leg. Their foot has started tingling. Sitting makes it worse. When you ask a little more, they also mention that the leg feels weaker than usual.

You still do not have a diagnosis, and you do not need one to recognise that the assessment has changed. “Pain 7/10” has become a pattern of pain with neurological features that needs appropriate assessment, communication and escalation according to the clinical context and local policy.

That is why the words matter.

Aching, burning, shooting, electric, throbbing, cramping, gripping, pressure and heaviness are not labels to memorise and match to diseases. They are pieces of information offered by the patient. Your job is to listen to them, work out what they add to the clinical picture and decide what you need to assess next.

So when a patient tells you their pain is 7 out of 10, record the number. Then ask the question that turns a score into an assessment:

“What does the pain feel like?”

References

Faculty of Pain Medicine (n.d.) e-PAIN. Royal College of Anaesthetists.

International Association for the Study of Pain (IASP) (2020) IASP announces revised definition of pain. Washington, DC: IASP.

International Association for the Study of Pain (IASP) (2021) Allodynia and hyperalgesia in neuropathic pain. Washington, DC: IASP.

International Association for the Study of Pain (IASP) (2026) What is neuropathic pain? Washington, DC: IASP.

International Association for the Study of Pain (IASP) (n.d.) IASP terminology. Washington, DC: IASP.

NHS (2023) Chest pain. NHS.