Basal Thumb Arthritis

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If you’re experiencing persistent thumb pain, especially near the base of the thumb, you might be dealing with a condition called basal thumb arthritis. In this article, you’ll learn what this common issue is, what causes it, how it’s diagnosed, and the treatment options that can provide relief and help you get back to your daily activities.

At JIS Orthopedics in New Albany and St. Clairsville, OH, our team of board-certified orthopedic surgeons specializes in treating hand and wrist conditions like thumb arthritis. Contact us today to explore your options and start your journey to better hand health.

What is Thumb Arthritis?

Thumb arthritis, also known as basal joint arthritis, occurs when the cartilage in the thumb carpometacarpal (CMC) joint wears down. This joint, located at the base of the thumb, enables a wide range of motion, including gripping, pinching, and rotation.

When this cartilage wears away, the bones of the thumb joint begin to rub against each other, causing pain, inflammation, and reduced motion. The CMC joint is particularly susceptible due to its high usage in daily tasks and the stress placed on it when you grip things or pinch.

Symptoms of Basal Thumb Arthritis

Basal thumb arthritis symptoms usually develop gradually and worsen over time. You may notice:

Pain and tenderness at the base of the thumb
Swelling, stiffness, and inflammation
A grinding or clicking feeling when moving the thumb
Difficulty pinching, grasping, or turning objects like keys
Reduced strength and the inability to glide easily during motion
Discomfort that worsens in daily living or after overuse

These symptoms can make it hard to perform simple tasks like opening jars or using your smartphone.

Causes and Risk Factors

The most common cause of thumb arthritis is osteoarthritis, a degenerative condition where joint cartilage wears away over time. Several factors may increase your risk, including:

Age (more common over 40)
Female gender
Prior thumb injuries
Joint laxity or instability
Repetitive stress on the thumb joint
Genetics

The condition may also coexist with arthritis in other joints, especially in the hands and wrists.

Diagnosis

Diagnosis typically involves a physical examination and imaging tests. Your doctor may:

Examine the joint at the base of your thumb for tenderness, swelling, and deformity
Move the thumb joint to assess pain and motion
Order X-rays to evaluate joint space, bone damage, and alignment of the metacarpal bone and trapezium

Early diagnosis is key to developing a personalized treatment plan that slows progression and offers long-term pain relief.

Treatment Options

Thankfully, basal thumb arthritis is a very treatable condition. Treatment plans often begin conservatively with options for surgery if symptoms worsen:

Non-Surgical Treatments

Rest and activity modification
Use of thumb splints or braces
Over-the-counter or prescription pain relievers
Corticosteroid injections to reduce inflammation
Hyaluronic acid injections to lubricate the joint
Occupational therapy to strengthen the thumb and improve function

These measures often provide relief for several months or longer.

Surgical Options

If conservative treatments don’t provide enough relief or if you’re struggling to bend, twist, or use your thumb effectively, your doctor may recommend surgery to restore function and reduce pain. Several surgical procedures are available, depending on the severity of your condition and your daily activity needs:

Joint fusion (arthrodesis): This procedure permanently fuses the bones in the affected thumb joint, creating a stable structure that can bear weight without pain. However, the fused joint will no longer have flexibility.
Osteotomy: In this surgery, the bones of the thumb carpometacarpal (CMC) joint are repositioned to improve alignment and correct deformities, which can reduce discomfort and improve function.
Trapeziectomy: This involves removing one of the small bones at the base of the thumb to relieve pressure and pain in the joint.
Joint replacement (arthroplasty): In this approach, all or part of the damaged joint is removed and replaced using a graft, often taken from a tendon in your forearm, to cushion the space and restore movement.

These procedures can dramatically improve the quality of life for many patients, particularly when thumb arthritis has progressed to the point of significantly limiting motion or causing constant thumb pain.

What Can I Expect if I Have Arthritis in My Thumb?

Living with basal thumb arthritis can be challenging, especially when it starts to limit movement and interfere with everyday tasks. But with the right diagnosis and treatment options, you can manage symptoms and improve your quality of life.

Most patients see significant improvement in thumb pain, strength, and function with early intervention. Surgical treatments, when necessary, are highly effective and tailored to your specific needs and lifestyle.

Take the First Step Toward Relief

Whether you’re just starting to feel discomfort or have been living with thumb arthritis for years, help is available. At JIS Orthopedics, our experts are here to guide you through every step, from diagnosis to treatment to recovery.

Contact our offices in New Albany or St. Clairsville to schedule a consultation and explore the best treatment path for your thumb joint pain. Let us help you get back to doing what you love, without the pain.

Medically reviewed by Dr. AJ Julka

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