Hallux Rigidus: Big Toe Arthritis & Ultrasound-Guided Injection Treatment

Hallux rigidus is osteoarthritis of the joint at the base of the big toe, the first metatarsophalangeal (MTP) joint. As the cartilage wears, the joint narrows, bone spurs (osteophytes) form and the toe gets progressively stiffer, which makes pushing off during walking increasingly uncomfortable. Treatment ranges from footwear and rehabilitation to injections and, for advanced disease, surgery, and the right choice depends on the severity, how much movement remains, whether there's inflammation, and how much it's affecting you. Importantly, not everyone with hallux rigidus needs surgery.

What is hallux rigidus?

It's osteoarthritis of the first MTP joint, where the first metatarsal meets the proximal phalanx of the big toe. As the arthritis develops it can cause joint-space narrowing, osteophytes, thickening of the underlying bone, joint inflammation (synovitis), increasing pain and a progressive loss of movement, the "rigidus" reflects that growing stiffness. The joint matters because the big toe normally bends upwards as your body moves over the foot; when it's stiff and painful, push-off suffers.

What causes it?

There isn't always one clear cause. Hallux rigidus can be linked to a previous big-toe injury, repetitive loading, individual anatomy and biomechanics, degenerative osteoarthritis over time, or inflammatory joint disease. Some people have a family history, suggesting anatomical and genetic factors play a part. Previous trauma is especially relevant in younger patients, whereas in many people it develops gradually with no memorable injury.

Symptoms

• Pain at the base of the big toe, and stiffness of the joint
• Difficulty bending the toe upwards
• Pain pushing off when walking, or when running/exercising
• Swelling around the joint, and often a prominent bump (osteophyte) over the top
• Shoes pressing on the joint, and reduced walking tolerance

Early on, pain often occurs mainly during exercise or when the toe reaches the end of its available movement. As it progresses, the joint stiffens and pain can spread through more of the range or occur during everyday activities.

Is every painful big toe hallux rigidus?

No, and telling these apart matters before considering an injection:

• Gout can affect exactly the same joint, but a classic attack comes on suddenly with marked pain, swelling, heat and redness. Hallux rigidus behaves more like a persistent mechanical problem, though an arthritic joint can also flare, and the two can coexist. If it's unclear, history, examination, imaging and occasionally blood tests or joint aspiration help.
• Bunion (hallux valgus) is mainly deviation of the big toe towards the second toe with a prominence on the inner side; hallux rigidus is mainly joint degeneration and lost movement. You can have both.
• Turf toe follows an acute hyperextension injury, typically in sport; hallux rigidus is a chronic arthritic disorder (though an old joint injury can lead to arthritis later).
• Sesamoid pain is felt mostly underneath the joint, since the sesamoid bones sit beneath the first metatarsal head.

How I diagnose it, X-ray vs ultrasound

Diagnosis combines your history, examination and imaging. On examination I look at exactly where the pain is, first-MTP movement, whether pain happens only at the end of dorsiflexion or throughout, swelling, palpable osteophytes, joint-line tenderness, and how the joint behaves during push-off. Distinguishing pain from dorsal impingement (the bone spur catching at end-range) from pain throughout a severely arthritic joint is particularly important, because it influences treatment.

Weight-bearing X-rays are the most useful test for structural severity, showing joint-space narrowing, osteophytes, sclerosis, cysts and alignment, and are especially helpful if surgery is on the table. Ultrasound gives different information: joint effusion, synovial thickening, active Doppler synovitis, osteophytes, the capsule and nearby tendons, and it lets me watch the needle continuously during an injection. So ultrasound complements, rather than replaces, weight-bearing X-rays.

Treatment starts conservatively

The evidence base here is genuinely thin: the 2024 Cochrane review of non-surgical treatment for first-MTP osteoarthritis found only six randomised trials (547 participants), far less than for knee or hip OA (Munteanu et al., 2024). So treatment combines the available research with your examination, structural severity and goals.

Footwear modification

One of the simplest wins is reducing how far the painful joint has to bend during walking: relatively stiff-soled or rocker-soled shoes, a wide, deep toe box, avoiding shoes pressing on a dorsal bump, and shoe-stiffening inserts. It makes biomechanical sense, less movement through the painful joint at push-off. Randomised evidence suggests orthoses and rocker-sole shoes help some people, though it manages symptoms rather than reversing the arthritis (Munteanu et al., 2024).

Activity modification & rehabilitation

The aim isn't to stop exercising, it's to modify activities that repeatedly force the toe into painful dorsiflexion. Cycling and swimming are often easier to tolerate than running or jumping. Physiotherapy can address gait, lower-limb strength, calf and ankle mobility, intrinsic foot muscle function and graded return to activity. But forcing motion into a severely arthritic joint with a mechanical block won't restore normal movement, and the specific evidence for exercise/manual therapy here is limited.

Anti-inflammatory medication

Topical or oral anti-inflammatories can help during painful inflammatory episodes where medically appropriate, reducing symptoms without correcting the underlying arthritis.

Corticosteroid injection

A corticosteroid injection is worth considering when symptoms persist despite appropriate conservative care, particularly if examination or ultrasound shows an inflammatory component (synovitis or effusion). Corticosteroid is an anti-inflammatory: the aim is to reduce pain and inflammation, not to regenerate cartilage or cure the arthritis. A randomised trial of first-MTP injections found significant improvement, maintained to at least six weeks (Emami Razavi et al., 2021). It's most useful with mild-to-moderate arthritis, a painful inflammatory flare, synovitis or effusion, some preserved movement, and persistent pain despite footwear and activity changes, and less attractive long-term once the joint is severely narrowed, mechanically blocked and painful throughout movement.

How long does it last? It varies a lot, some people get weeks to months of meaningful relief, others little. So I don't promise a duration; it's a symptom-modifying treatment, not something that changes the arthritis itself.

Why ultrasound? The joint is superficial, and the randomised trial didn't show better outcomes from ultrasound versus landmark guidance at six weeks (Emami Razavi et al., 2021). The value in my practice is different: assessing the joint immediately beforehand, spotting synovitis or effusion, seeing the osteophytes and altered anatomy, watching the needle enter the joint and confirming accurate intra-articular placement, which matters most when spurs and narrowing make the anatomy tricky.

Evidence: moderate, short-term pain relief, especially with inflammation

Hyaluronic acid & PRP

Hyaluronic acid (HA) is a natural component of joint fluid, widely used in larger joints. Some small studies report improvement in the big toe, and a 2024 systematic review found encouraging short-term results, but of generally low quality (Butler et al., 2024). More importantly, the 2024 Cochrane review found the placebo-controlled evidence did not show a clinically important advantage of HA over a saline injection (Munteanu et al., 2024). So I wouldn't describe HA as cartilage-protecting or claim reliable 6–12 month benefit. That doesn't mean it never helps, individuals can improve, and newer cross-linked preparations are being studied (Morera et al., 2024), so HA can be discussed as an option in selected patients (for example when avoiding steroid is preferable), with an honest explanation that the evidence here is uncertain.

Hyaluronic acid: limited/uncertain evidence for the big toe

As for PRP, there's currently insufficient high-quality direct evidence to recommend it routinely for hallux rigidus, knee OA data can't simply be extrapolated to this much smaller, biomechanically different joint. I'd regard it as investigational here rather than a routine treatment.

PRP: investigational for the first MTP joint

When surgery is considered

Surgery comes into play when hallux rigidus keeps substantially interfering with walking, exercise or quality of life despite appropriate non-operative treatment. The right operation depends mainly on the severity and location of the arthritis.

Cheilectomy

A cheilectomy removes the dorsal bone spurs and part of the impinging metatarsal head while keeping the joint. It suits mild-to-moderate hallux rigidus where pain is mainly from dorsal impingement at end-range. A 2024 review found substantial improvements in pain, movement and function, though much of the evidence is observational (Arceri et al., 2024; Semelsberger et al., 2024). It doesn't remove the underlying arthritis, so symptoms can progress later.

First MTP fusion (arthrodesis)

For advanced hallux rigidus, fusing the joint is the benchmark. The damaged surfaces are removed and the bones fused, which permanently removes movement at the joint, but also removes pain from the arthritic surfaces. Systematic reviews continue to support arthrodesis as the most reliable option for advanced disease, especially when pain relief is the priority (Guzmán et al., 2024).

Joint replacement / Cartiva

Motion-preserving implants aim to keep some movement, which appeals to some patients, but newer evidence raises concerns about residual pain and revision surgery. A 2026 review comparing the Cartiva synthetic cartilage implant with fusion concluded Cartiva may preserve movement with similar short-term function, but pain relief appears to favour fusion (Jeremic et al., 2026). It's a decision to weigh carefully with a foot and ankle surgeon.

My approach

In practice I match treatment to the stage:

1. Mild disease, footwear modification, activity/load management, rehabilitation ± medication; consider a corticosteroid injection if significant pain or synovitis persists.
2. Mild-to-moderate disease, with useful remaining movement, consider a corticosteroid injection (especially where inflammation is present). HA can be discussed in selected patients, with the evidence caveats. If pain is mainly from dorsal impingement despite conservative care, a surgical opinion regarding cheilectomy is reasonable.
3. Advanced disease, severe narrowing, marked stiffness, pain throughout movement and major functional limitation: repeated injections are less likely to give a durable solution, and a surgical opinion (particularly first-MTP fusion) becomes more appropriate.

I'm most likely to recommend a corticosteroid injection when hallux rigidus is causing significant pain, footwear and activity changes haven't been enough, there's clinical or ultrasound evidence of inflammation, useful movement remains, and you'd like to delay surgery. I'm less likely to keep injecting a severely destroyed, mechanically stiff joint, there an injection may still give temporary relief, but it shouldn't indefinitely delay an appropriate surgical opinion.

Frequently asked questions

References