Muscle pain can feel like tightness, aching, burning, or a sharp pull. Sometimes it settles with simple changes. Other times, it signals a muscle strain, a bruise, or nerve irritation that needs a clearer plan.

Since the causes vary, the goal is to work out whether you can self-manage, or whether you need an assessment. For the broader context, start with soft tissue injuries, and if your symptoms began after training, also see delayed onset muscle soreness (DOMS).

If your pain follows a sudden sprint, lift, slip, or overload, treat it like an injury until proven otherwise. If it keeps returning, it may relate to workload, technique, recovery, or another health issue that needs checking. For early do’s and don’ts in the first few days, see the HARM protocol.

Muscle pain vs muscle injury

Quick answers people often search

Is it DOMS or a strain? DOMS usually builds 12–48 hours after harder-than-usual exercise and feels sore across a broader area. A strain more often feels sharp at the moment it happens, then hurts with contraction or stretch.

Why does it hurt when I move? Injured muscle fibres and their surrounding tissue can become sensitive. Pain with specific movements often points to a local strain, tendon issue, or joint-related referral.

Should I keep training? Light, pain-limited movement often helps. However, hard training through sharp pain can slow recovery and raise re-injury risk.

Common causes of muscle pain

Muscle strain or tear

A “pulled muscle”, “muscle strain”, and “muscle tear” often describe the same issue: overloaded muscle fibres with varying severity. Find the full guide here: muscle strain.

Contusion, haematoma, DOMS, and cramps

Direct impact (such as a corked thigh) can bruise muscle and form a haematoma. Overtraining or new loads can trigger DOMS. Meanwhile, cramps can link to fatigue, heat, hydration, and load spikes—see muscle cramps.

Trigger points and myofascial pain

Tight bands (“knots”) can refer pain and change how a muscle works. Many people find hands-on care useful, including trigger point therapy and, when suitable, dry needling & acupuncture.

Rhabdomyolysis

Rhabdomyolysis is rare but serious. It can follow extreme exertion, heat illness, or certain medications. If you have severe muscle pain with marked weakness, swelling, or dark urine, seek urgent medical care.

Systemic causes

Not all muscle pain comes from injury. Viral illness, inflammatory conditions, and persistent pain conditions can contribute. If your muscle pain feels widespread, lasts longer than expected, or comes with fevers, night sweats, unexplained weight change, or significant fatigue, organise a medical review.

What does a muscle injury feel like?

Many muscle strains share these features:

• Sudden pain that worsens during contraction
• Tenderness and tightness
• Swelling or bruising (sometimes delayed)
• Weakness and reduced performance
• Pain when stretching the muscle
• Reduced range of motion or loss of function

How do you treat muscle pain after an injury?

Most muscle injuries improve with the right mix of protection, progressive loading, and return-to-activity planning. Early on, many people benefit from relative rest, compression, and gentle movement. After that, targeted strengthening and graded exposure help restore capacity. If you want a step-by-step framework, see soft tissue injury healing.

If your symptoms match a common region, these pages can help you narrow down the likely tissues involved:

• Back muscle pain
• Calf muscle tear
• Groin strain
• Hamstring strain
• Thigh strain

Mid-recovery, you may also find therapeutic massage useful for comfort, movement confidence, and training tolerance, alongside your exercise plan.

For an Australian overview of common causes (including overuse, tension, and illness), see this external health resource: Healthdirect Australia: muscle aches and pains.

How are muscle injuries graded?

Grade 1 (mild)

Grade 1 strains involve small fibre overload and local pain, often with minimal strength loss. Many people do well with guidance on progressive loading, plus a return-to-training plan that avoids sudden spikes.

Grade 2 (moderate)

Grade 2 strains involve more fibre disruption, bruising, and greater weakness. Rehab often needs a structured approach to restore strength, control, and speed, while reducing re-injury risk.

Grade 3 (complete rupture)

Grade 3 injuries are uncommon but serious. They may need surgical input, followed by progressive rehabilitation. Early assessment matters, so you can match treatment to the injury.

What helps muscle injuries recover well?

Until you have a clear diagnosis, these steps usually help:

1. Keep moving within tolerable pain, but avoid sharp pain and sprinting/lifting through it.
2. Use compression and elevation if swelling develops.
3. Use ice briefly if it reduces pain, but prioritise gradual loading as soon as suitable.
4. If walking is painful, use a gait aid (such as crutches) short term.
5. Reduce training load, then rebuild it in stages.

When can you start training again?

Return to sport can be simple or tricky, depending on the muscle and your sport. Hamstrings and calves, for example, often need careful progressions. A useful checklist includes:

1. Strength and endurance testing that matches your sport (not just pain-free walking).
2. Control and technique checks (hip, trunk, and lower limb mechanics).
3. Gradual exposure to speed, direction change, and high-load positions.
4. Workload planning across the week to avoid spikes.
5. A recovery plan that includes sleep, nutrition, and smart scheduling.

Related articles

1. Muscle injury diagnosis
2. Hip adductor tendinopathy
3. Greater trochanteric pain syndrome
4. Shin pain
5. Thigh pain
6. Calf strain and tear

What to do next

If your muscle pain is mild and improving, keep loads light and build back up gradually. On the other hand, if you felt a sudden pull, can’t train normally, keep re-injuring the same area, or your symptoms do not improve within 10–14 days, a physiotherapist can assess the tissue, confirm the likely grade, and map out a step-by-step return to activity plan.

References

1. Wulff MW, et al. Return to sport, reinjury rate, and tissue changes after acute muscle strain rehabilitation (review). Sports Med. 2024. https://pmc.ncbi.nlm.nih.gov/articles/PMC11390226/
2. Hickey JT, et al. Hamstring strain injury rehabilitation: current clinical concepts. J Athl Train. 2021. https://pmc.ncbi.nlm.nih.gov/articles/PMC8876884/
3. Geraci A, et al. Prevention and rehabilitation of the athletic hamstring injury. Arthrosc Sports Med Rehabil. 2025. https://www.arthroscopysportsmedicineandrehabilitation.org/article/S2666-061X%2824%2900164-0/fulltext
4. Agostini F, et al. Rehabilitative good practices in the treatment of patients with muscle injuries. J Clin Med. 2025. https://www.mdpi.com/2077-0383/14/15/5355