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Why Does My Thumb Hurt When I Straighten It?

Published in Thumb Pain 3 mins read

Your thumb might hurt when you straighten it due to various reasons, including trigger thumb.

Understanding Possible Causes of Thumb Pain When Straightening

Several factors can contribute to thumb pain when straightening it. While it's important to consult a medical professional for an accurate diagnosis, here's a breakdown of potential causes:

Common Causes

  • Trigger Thumb (Stenosing Tenosynovitis): This condition causes pain along the palm side of your thumb. The tendons that bend your thumb can become inflamed and thickened.
    • Symptoms: You might feel a clicking, catching, or popping sensation when you try to bend and straighten your thumb. A painful nodule may also develop.
    • Explanation: The thickened tendon may get stuck when trying to move through the sheath, causing the painful catching sensation.
    • Reference: As stated in the provided reference, "Trigger thumb is another common cause of thumb discomfort. It causes pain along the palm side of the thumb, along with a clicking, catching, or a popping sensation when bending and straightening the thumb. Occasionally a painful nodule can be felt."

Other Possible Causes

  • Arthritis: This common condition can affect the joints in your thumb, causing pain, stiffness, and reduced range of motion when straightening.
  • De Quervain's Tenosynovitis: This condition affects the tendons on the thumb side of the wrist. It can cause pain when moving your thumb, including when straightening it.
  • Sprain or Strain: Overstretching or injuring the ligaments or muscles around your thumb can cause pain and discomfort when straightening.

What to Do About Thumb Pain

It's crucial to see a doctor for proper diagnosis and treatment, but you can take steps at home:

  • Rest: Avoid activities that cause your thumb pain.
  • Ice: Apply ice to your thumb for 15-20 minutes at a time, several times a day.
  • Over-the-Counter Pain Relievers: Medications like ibuprofen or acetaminophen can help reduce pain and inflammation.

When to Seek Medical Help

It is important to consult a healthcare professional if:

  • Your pain is severe.
  • Your symptoms do not improve with self-care.
  • You experience numbness or tingling in your thumb.
  • You notice significant swelling or redness.
Symptom Possible Cause(s)
Pain when straightening Trigger thumb, arthritis, sprain, strain
Clicking, catching, popping Trigger thumb
Painful nodule Trigger thumb

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