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Information sheetPain and ergonomics · No. 298

Pain vs injury: knowing the difference

Learning to tell ordinary muscle soreness apart from a real injury helps you respond safely and confidently.

2 min read · Awareness resource · Reviewed 2026-09-15

After a workout or a physically demanding day, it can be hard to know whether what you are feeling is normal tiredness or something that needs attention.

What it is

Pain and injury are related but different. Muscle soreness after new or intense activity, sometimes felt a day or two later, is a normal response to muscles adapting and rebuilding - it is usually dull, spread across a muscle, and improves within a few days. Injury, on the other hand, often involves sudden or sharp pain, is usually linked to a specific movement or moment, and may come with swelling, bruising, weakness or instability. Knowing the difference helps you decide whether to rest and continue gently, or to get it checked.

Signs to notice

  • Dull, aching soreness on both sides of the body that eases within a few days: usually normal
  • Sharp, sudden or one-sided pain linked to a specific movement: possible injury
  • Swelling, bruising or visible deformity around a joint or muscle
  • Pain that worsens rather than improves over 48 to 72 hours
  • A joint that feels unstable, locks, or gives way
  • Pain that changes how you walk, move or use a limb

What helps

  • For ordinary soreness, gentle movement, stretching and rest usually help it resolve within a few days.
  • Apply ice to reduce swelling soon after a suspected injury, and avoid putting weight on an area that feels unstable.
  • Avoid pushing through sharp or worsening pain - this is different from the discomfort of a good workout.
  • Give your body time before returning to full activity after a suspected injury, even if it feels better quickly.
  • Keep a simple note of what happened, when, and how the pain has changed, to help a professional assess it accurately.
  • When in doubt, treat it cautiously and get it checked rather than guessing.

When to reach out for help

See a doctor or physiotherapist if pain is sharp, does not improve within a few days, comes with swelling or bruising, or affects your ability to move or bear weight normally. Sudden, severe pain, an obviously deformed joint, or inability to move a limb needs urgent medical attention.

Getting help in South Africa

A physiotherapist, biokineticist or doctor can assess pain accurately and guide safe recovery, often accessible through medical aid networks. Cleared Mind's EAP counsellors are available if injury setbacks are affecting your mood, motivation or sense of identity as an active person. For general mental health support, contact the SADAG Mental Health Line on 011 234 4837.