What is Pain?

What Is Pain? How Do We Treat It?

Dr. Joe assessing hip pain

We talk about pain all the time. It is the foundation of what we do at PHYT For Function. Yet it is surprising how much we are still learning about the mechanisms behind this universal experience.

The goal of this blog is to give you a clearer understanding of what your pain may be telling you and how we can approach treating it. Getting out of pain is not a one-size-fits-all equation.

At its most basic level, pain is an emotional response to a real or perceived threat to the body.

Before diving into the physical side, it is important to understand the emotional component. Your brain is constantly evaluating how threatening a signal is and deciding how strongly it should respond. To some extent, pain is learned. Your brain develops a sense of what is dangerous and how much protection is needed.

Think of a child who falls. They often look around before reacting. In that moment, they are learning what is harmful and what is not.

This is why language matters in healthcare. If someone is told they have a serious-sounding condition, they may begin to associate their pain with danger, even when the situation is not actually harmful. Not every fall is dangerous, and not every diagnosis means long-term damage.

Pain is also influenced by meaning. If you rely on your hands for your livelihood, an injury to your hand will likely feel more threatening than the same injury somewhere else. Even if the physical input is identical, the emotional weight can amplify the pain experience.

What Is Happening in the Body?

Throughout the body, there are sensory receptors called nociceptors. Their role is to detect potential threats and send signals to the brain. These threats can come from external sources like bacteria or internal stressors such as pressure, temperature, or chemical changes. Nociceptors are always sending low level information to the brain. When a threat is detected, their signaling increases. This increase is called neurogenic excitation. The key driver of this process is inflammation.

Inflammation is a natural response designed to repair tissue and protect the body. When sensory nerves are exposed to stress, they release inflammatory chemicals into the surrounding area. These chemicals increase blood flow, activate the immune system, and heighten the sensitivity of pain receptors.

As inflammation increases, nerve activity increases. As nerve activity increases, the brain perceives more pain.

Why Pain Does Not Always Mean Damage

Pain is not a direct measure of tissue damage. It reflects how the brain interprets incoming signals. This is why pain can persist even after tissue has healed. It is also why different people can experience the same injury in very different ways. The brain considers context, past experiences, stress levels, and emotional state when deciding how much pain to produce.

When Pain Becomes Persistent

In some cases, pain continues beyond the normal healing process. This can happen when local inflammation does not fully resolve, when systemic inflammation is elevated due to factors like stress or sleep, or when the nervous system becomes more sensitive over time.

This increased sensitivity is known as central sensitization. You can think of it like an alarm system that becomes too reactive. At first, it responds appropriately to real threats. Over time, it may begin to react to smaller and smaller inputs. At that point, the issue is not just the signal itself, but how the system is processing it.

What This Means for Treatment

If pain is influenced by both the body and the nervous system, treatment needs to address both. This includes improving movement and reducing unnecessary stress on tissues. It also involves managing inflammation and helping regulate the nervous system’s response to perceived threat.

Lasting results come from addressing the system as a whole, not just the symptoms.

Conclusion

Pain is not the enemy. It is information. It is your body’s way of protecting you from real or perceived threats. The goal is not simply to eliminate pain, but to understand it and respond appropriately. When you do that, you move beyond temporary relief and start creating lasting change.