Chronic pain

What is pain?

Pain is a complex, subjective experience that helps protect us from injury. It is both sensory and emotional—and it is processed in the brain, not only in the place that hurts.

Most pain starts with a stimulus: a sore shoulder, an inflamed joint, pressure on a nerve. That stimulus is not pain itself. Sensors called nociceptors detect temperature, pressure, and chemical changes from inflammation. Signals travel through fast nerve fibers (sharp, sudden pain) and slower fibers (dull, aching pain) to the spinal cord and then the brain. Only there, combined with memory, attention, emotion, and expectation, does it become the experience of pain.

That distinction matters. The same injury can feel different to different people. We often assume others feel pain the way we would, but chronic pain is sometimes called an invisible disease—there may be no cast, swelling, or obvious wound, yet the pain is real.

Pain is not localized to a single “pain center.” Multiple brain networks contribute, which is one reason effective treatment often needs more than one approach.

Pain affects far more than physical sensation. In the United States:

• An estimated 50–100 million Americans live with chronic pain—more than diabetes, heart disease, and cancer combined, according to the IOM report Relieving Pain in America ↗.
• Uncontrolled pain costs more than $500 billion per year in treatment and consequences, per the CDC report Prevalence of Chronic Pain and High-Impact Chronic Pain Among Adults — United States, 2016 ↗.
• Over 20 million Americans live with high-impact chronic pain that significantly limits daily life.
• Pain is a leading cause of disability and lost work.

Acute pain and chronic pain

Acute pain warns you about new injury and usually eases as tissues heal. Chronic (persistent) pain lasts beyond normal healing—often defined as longer than three to six months—and can persist even when extensive tissue damage is no longer present. High-impact chronic pain severely limits work, self-care, or social life and is often accompanied by worse sleep, mood, and function.

Different kinds of pain

• Somatic pain comes from skin, muscle, bone, or joint injury. It is usually easier to pinpoint—like knowing exactly which thumb you hit with a hammer.
• Visceral pain arises from internal organs and is often diffuse—a stomachache can feel like a broad area rather than one sharp spot. It can also be felt in other body regions through shared nerve pathways in the spinal cord.
• Neuropathic pain follows nerve injury or disease. People often describe it as burning, shooting, stabbing, or electric shock-like sensations.

Pain and mental health

Comprehensive pain care treats the whole person. Separating “physical” from “psychological” pain often adds judgment without helping the person in front of you. If someone is in pain, the goal is to address the pain.

Anxiety, depression, poor sleep, fatigue, and anger commonly overlap with chronic pain—and can amplify it. Catastrophizing (assuming the worst) is one of the strongest predictors of worse pain and poorer treatment response. Contained anger and outward anger both tend to make pain worse.

Stress also matters. The brain is not a passive receiver of signals from the body; it changes how the nervous system and hormones respond. Chronic stress can worsen pain even when the original injury has healed.

Hurt versus harm

One of the most important ideas in chronic pain care is the difference between hurt and harm. Pain may hurt intensely without causing ongoing tissue damage.

Ask yourself:

• Does this pain mean I need medical attention now or soon?
• Would continuing this activity make an injury worse?
• Is pain limiting work, relationships, sleep, or daily tasks?
• Am I anxious, frightened, or overwhelmed by the pain?

In many chronic pain conditions, the body has already healed as much as it will, yet the nervous system remains sensitized. The pain is real, but movement may be safe even when it hurts. At the same time, new or worsening symptoms with fever, numbness, weakness, or loss of function should be evaluated promptly.

Tools that can help right now

Attention and distraction

During the day, engaging in absorbing activities—reading, walking, time with others—can lower pain by engaging brain networks involved in attention. Nights are often hardest because there is less to distract from pain when trying to sleep.

Mindfulness and acceptance

Mindfulness-based stress reduction (MBSR) has strong evidence for pain, anxiety, and depression. A useful starting point: notice the pain without judging it—“I am aware the pain is there, and I am not going to label it good or bad. I am just noting its presence.”

Cognitive reframing

Another approach asks whether pain is threatening or simply unpleasant. Reframing “this hurts but is not harming me” is a foundation of cognitive behavioral therapy (CBT).

Gate control and touch

Rubbing a bumped elbow, gentle massage, or light touch activates nerve fibers that can inhibit pain signals in the spinal cord—the basis of the gate control theory of pain. Heat and cold help too: cold often helps in the first day or two after an acute injury by reducing inflammation and slowing nerve firing; heat may help later with muscle tension and recovery.

Movement, pacing, and sleep

Exercise and gradual movement can raise pain thresholds over time. The trap many people fall into is doing too much on a good day and then crashing for days afterward. Pacing means small, steady increases—if you can walk one block comfortably, add a little distance the next day, not five blocks because you finally feel better. On bad days, rest if needed, then resume at your prior level rather than stopping activity altogether.

Sleep is part of healing. If pain keeps you from sleeping, talk with your care team about balancing medication, movement, and behavioral tools at the lowest effective dose.

Six approaches to chronic pain treatment

No single treatment works for everyone. The best outcomes usually come from combining several approaches tailored to your goals—especially improving function and quality of life, not only lowering a pain number.

1. Medications

   There are more than 200 medications used in pain care, though only a few are FDA-approved specifically for pain. Specialists often draw from multiple fields—antidepressants, anti-seizure medicines, and others—that act on pain-related circuits in the brain and nervous system. Over-the-counter options such as ibuprofen and naproxen can help with inflammation and sensitivity after injury, but they are not a fit for every person or every condition.

2. Nerve blocks and procedures

   These range from trigger point injections to nerve blocks with local anesthetic or steroid, and on to minimally invasive options such as spinal cord stimulation or implantable drug delivery pumps when appropriate.

3. Psychological and behavioral therapies

   Pain psychology teaches practical skills—not long-term analysis on a couch. Cognitive behavioral therapy, mindfulness-based stress reduction (MBSR), acceptance and commitment therapy, relaxation training, and biofeedback can reduce pain’s impact on daily life by changing how the brain processes threat, attention, and emotion.

4. Physical and occupational therapy

   Rehabilitation is central to chronic pain care. Therapists help with pacing, body mechanics, strength, endurance, and returning to meaningful activity—often teaching the difference between hurt and harm along the way.

5. Complementary approaches

   This includes acupuncture, nutraceuticals, and other evidence-informed options. Some over-the-counter supplements have been studied for nerve-related pain, though any supplement should be discussed with a clinician because “natural” does not always mean risk-free.

6. Self-empowerment

   Education, skill-building, and confidence matter. Learning how pain works, what helps your body, and how to pace activity often makes other treatments more effective.

Brief skills-based programs such as Empowered Relief® compress key pain-coping tools into a single session and are being studied and deployed nationally as a scalable complement to longer courses of CBT.

Nutrition and whole-body health

Nutrition can influence pain for some people, especially when certain foods trigger flares. Identifying triggers is difficult because reactions may lag by days. Working with a clinician, keeping a food journal, and using careful elimination and reintroduction under guidance can help. Anti-inflammatory eating patterns and adequate sleep support recovery for many people living with pain.

A vision for better pain care

PainUSA advances the U.S. National Pain Strategy ↗—a bipartisan plan developed with researchers, clinicians, policymakers, and people with lived experience. It calls for better assessment, professional education, public communication, and access to multimodal care. Fully implementing that strategy could meaningfully improve life for millions of Americans living with pain.

Getting specialized care

For complex or persistent pain, comprehensive pain centers bring medication, procedures, psychology, and rehabilitation together. Primary care doctors can often coordinate referrals; in rural or underserved areas, digital tools and brief online skills programs are increasingly used to extend access.

What to expect

1. Referral and first contact

   Many people reach a pain clinic through their primary care doctor, though comprehensive centers also accept self-referrals in some settings.

2. Comprehensive evaluation

   A team may include pain physicians, psychologists, physical therapists, and others. They review your history, exam, function, sleep, mood, and sometimes imaging or nerve testing.

3. Personalized treatment plan

   Care is usually multimodal: several of the six approaches above combined and adjusted over time based on what helps you function better.

Can chronic pain improve?

Few treatments eliminate pain entirely. The realistic goal for many people is meaningful improvement: less suffering, better sleep, more activity, and greater control over daily life. Some people experience substantial relief; others benefit from combining several modest gains. Successful care does not always mean being pain-free—it means moving forward with function, relationships, and purpose despite pain.