The peroneus tertius is a muscle of the lower leg. The muscle connects the small bone of the lower leg to a bone on the outside of the little toe. It contributes to pain in the front of the foot and ankle and pain in the heel.

Contents of Article

    Where Is The Peroneus Tertius Muscle?

    Peroneus Tertius Muscle Showing Trigger Point Location

    The peroneus tertius muscle attaches to the bottom of the small bone of the lower leg (fibula), going down the leg, passing in front of the outer anklebone (lateral malleolus), and connects to the top bone (metatarsal) of the little toe.

    What Movements Does It Control?

    • Helps to raise the foot up toward the body
    • Helps to turn the sole of the foot out

    For detailed anatomy information:Peroneus Tertius Anatomy


    Peroneus Tertius Muscle Trigger Points Symptoms:

    Peroneus Tertius Referred Pain Pattern
    • Pain at the bottom of the front of the leg that descends into the top of the foot and radiates toward the out to the ankle
    • Pain on the outside of the heel
    • Weak and buckling ankles
    • Pain surges with each step

    TWD Recommends

    ASO Stabilizing Ankle Brace is a support for ankles that is recommended by doctors, physical therapists, and athletic trainers. The brace is adjustable to provide not only support but also comfort. This support works well for peroneus tertius muscle problems because it not only supports the ankle but also provides support for the heel and arch. This brace will give you much-needed support and ease your pain if you have weak ankles and chronic ankle pain.

    What Causes Peroneus Tertius Trigger Points To Develop?

    • Running or walking on uneven ground
    • Worn shoes
    • Shoes that do not have proper padding in the ball of the foot
    • Wearing flip flops and other open heeled shoes
    • Wearing high heels
    • Walking or running barefoot in deep sand
    • Immobility in the big toe joints due to arthritis or injury

    TWD Recommends

    Sore shins or calves? Feel as if shin splints are coming on? The ProStretch Calf Stretcher & Foot Rocker can help! The stretcher/rocker stretches and helps to relax most of the muscles in the lower leg and foot. Physical therapists use them to treat sore shins and calves and foot pain, and plantar fasciitis.

    Peroneus Tertius Trigger Point Treatment

    To resolve and deactivate trigger points and their associated pain, you need to treat them several times throughout the day. Each treatment takes 1-2 minutes.
    If you are interested in learning how to treat trigger points, The Trigger Point Therapy Workbook is an excellent guide. It includes instructions and diagrams showing muscle locations as well as the trigger point location.
    You can also go to a massage therapist, chiropractor, or physical therapist who has training in trigger point therapy. They will be able to show you how to find the TrP and treatment method.

    Sombra Warm Therapy Gel is recommended for relaxing muscles and relieving pain. It warms without the burning heat of other gels. An excellent choice for pain caused by trigger points, muscle/joint over-use and stiffness, and arthritis. If you have reoccurring leg or foot cramps, you should keep Somba on hand; it provides almost instant relief. (Not sold in stores)

    Biofreeze Pain Relieving Gel is an excellent pain-relieving gel recommend for those who have sudden onset muscle pain or recent injuries.  It is better to use than warm therapy gels and creams for muscle pain caused by inflammation as it cools the area much like ice. If your pain is from a recent injury, use Biofreeze. It is excellent to use on sprains, strained and sore ankles.

    How Long Before I Feel A Reduction In Pain?

    The good news is that you will begin feeling relief quickly. Keep in mind that if you are experiencing toe-curling foot cramps, massaging this TrP will relax the muscle and stop the cramp.

    Keep in mind; you need to continue treating the trigger point until you do not feel the knot and the area is not painful when pressure is applied.

    Interesting facts:

    • Pain and ankle weakness felt in every step at the front of the leg where the leg goes into the foot is a prime indicator of trigger points in the peroneus tertius muscle. These symptoms are often diagnosed as ligament or tendon injury, tendinitis, or osteoarthritis.
    • This muscle is absent in 8% of the population.

    TWD Recommends

    Yoga Toes Gems are highly recommended for anyone dealing with foot and lower leg pain. The separators not only stretch the muscles of the feet but also many muscles of the lower leg. Used regularly, Yoga Toes do help straighten and align your toes. They can also be helpful for some cases of bunions, hammertoes, and claw toes. It can also help with issues of plantar fasciitis. I prefer the Yoga Toes Gems because they are more supple, comfortable, and easier to use. To increase therapeutic treatment, relax while wearing Yoga Toes and then use the massage balls (below) to further massage and relax the muscles of your feet.

    For Men’s shoe size ten and over or women shoe size 12 and over consider Yoga Toes For Men.

    Peroneus tertius muscle pain and symptoms can be similar to, contribute to, and be affected by these medical diagnoses:

    • Peroneal Nerve Entrapment Syndromes
    • L5 S1 S2 radiculopathy
    • Morton foot structure
    • Lateral Compartment Syndrome
    • Ankle Sprain/Strain Syndrome
    • Gout
    • Plantar fasciitis
    • Achilles tendon rupture or tear


    Other muscles that should be considered and examined:

    Satellite trigger points associated with the peroneus tertius muscle:

    Trigger points one muscle will cause TrPs to develop in other muscles. These are known as satellite trigger points. You will need to check these muscles for additional TrPs.

    • Peroneus Longus
    • Peroneus Brevis
    • Extensor Digitorum Longus
    • Tibialis Anterior
    • Tibialis Posterior
    • Extensor Hallucis Longus
    • Flexor Hallucis Longus
    • Anterior Gluteus Minimus

    TWD Recommends

    Massage balls can be used to relieve tension in many areas of the body and are exceptionally effective for your feet. The Flex Fixx Massage Ball Set includes a smooth ball and two spiked balls, which will give you maximum treatment for various aches and pains in your feet. The balls are sturdy and can deliver very firm pressure. The set comes with instructions and exercises. Rolling your feet takes just a few minutes each day and can provide excellent results for both foot and lower leg pain.

    Muscles That Contribute To These Symptoms:

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    Peroneus Longus and Brevis Muscles
    Extensor Digitorum Longus