Not All Pain Works the Same Way: Understanding Acute and Persistent Pain

Importantly, pain is real whether it has been present for a few days or several years. Persistent pain does not mean the symptoms are imagined. It means the systems involved in producing and responding to pain can become more sensitive and complex over time.

What is the Difference between Acute and Persistent Pain?

Acute Pain commonly occurs alongside a recent injury, illness or tissue irritation. It often changes as the body recovers.

Persistent Pain generally refers to pain that continues beyond the expected healing period, commonly for more than three months. At this stage, pain can be influenced by changes in nervous system sensitivity alongside physical, psychological, social and lifestyle factors.

Usual time frames for pain are categorised as Acute < 6 weeks; Sub-acute 6-12 weeks; Persistent/Chronic >12 weeks.

Although the duration and severity of pain can vary for every individual, it is important to have a tailored management plan to best plan a gradual return to usual activity.

What Happens When You Experience Acute Pain?

Acute pain often acts as a useful protective respons.

If you roll your ankle playing netball, strain a muscle at the gym or hurt your back lifting something, pain or muscle guarding can encourage you to temporarily change how you move while the area recovers.

During this stage, physiotherapy may focus on understanding the injury, managing symptoms and gradually restoring comfortable movement. As appropriate, strength training and progressive loading can help rebuild your capacity for work, sports, hobbies and everyday activities.

Recovery does not always mean waiting until you have absolutely no pain before moving. Depending on the injury, appropriate movements can form an important part of the recovery process.

Lower back pain is one common example of acute pain. If you are experiencing a recent episodes of back pain, read Acute Low Back Pain: What You Need to Know for practical advice on staying active, managing symptoms and supporting your recovery.

What Changes When Pain Becomes Persistent?

Pain is considered persistent when it continues beyond the expected healing period, often beyond three months.

By this point, the relationship between pain and tissue health can become less straightforward.

Our nervous system continually processes information from the body and environment. With persistent pain, this can sometimes become more sensitive, meaning activities or movements may produce a stronger pain response than they previously did.

This does not mean there is nothing happening or that the pain is not real. It means we may need to look beyond the original injury to understand what is maintaining the symptoms.

Sleep, stress, activity levels, previous pain experiences, general health, confidence with movement and nervous system sensitivity can all influence someone’s pain experience.

Why Does Pain Not Always Equal Damage?

This is one of the most important concepts in modern pain management.

Pain is designed to protect us, but the amount of pain we experience does not always directly correspond with the amount of tissue damage.

Think about a paper cut. A very small injury can be surprisingly painful. Conversely, people sometimes discover an injury or tissue change on a scan that was not causing any symptoms.

With persistent pain, the nervous system can become increasingly protective. Movements that are safe may still feel uncomfortable because the system has become more sensitive to potential threats.

Understanding this can help shift the focus from simply trying to eliminate every painful sensation towards gradually improving movement, strength and confidence.

How Can Physiotherapy Help with Persistent Pain?

There is rarely one exercise or treatment that resolves persistent pain for everyone.

Physiotherapy begins by listening to your experience and understanding how pain is affecting your life.

Together, we can look at factors that may be contributing to your symptoms and develop a rehabilitation plan based on what matters to you. This may include education about pain, gradually increasing activity, strength, mobility and function, implementing strategies to improve confidence with usual movement.

Services such as Clinical Rehab Pilates, Hydrotherapy or Exercise Physiology may also form part of a broader plan where appropriate.

The goal is not to tell you that pain is something you simply need to push through. It is to find a starting point your body can tolerate and progressively build from there.