Carpal Boss

Carpal boss is a condition above the wrist that you may barely notice. However, it can also cause significant discomfort and require surgical removal. But what exactly is it, how does it develop, and what are the symptoms? We explain it to you below:

What is carpal boss?

Carpal boss is a condition in which extra bone has developed on the back of the wrist. It appears as a small, immobile bump on the top of the wrist, typically located at the second and/or third joint between the carpal bones and the metacarpal bones. Pain at the site of the bump can range from mild to severe. In some cases, there is only swelling in the area without any discomfort. If that’s the case, there's usually no cause for concern.

How does it develop?

Carpal boss can develop due to trauma, excessive joint mobility, or wear and tear that leads to a bony growth. It is most commonly caused by abnormal fetal development. This extra bone often makes the area more sensitive to further trauma.

What are the symptoms?

For many people, carpal boss causes no symptoms and is often discovered by chance. However, this is not always the case. You may experience:

• A noticeable, painful clicking sensation as the extensor tendons slide over the bony bump.
• Pain and swelling in the wrist.
• Reduced range of motion.
• Increased discomfort with frequent use.

How do I treat carpal boss?

In principle, carpal boss is harmless. If swelling is the only symptom, you may choose not to treat it. However, the patient may opt to wear a wrist brace to relieve pressure on the joint. If treatment is chosen, the excess bone and the affected part of the joint must be surgically removed. It is recommended to discuss this with your local general practitioner.