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Right hand middle finger. When I stretch my hand then make a fist if I feel my knuckle there is a thin raised line that moves that isnt on other hand?

9 doctors weighed in
Dr. James Okamoto
Family Medicine
8 doctors agree

In brief: Tendon sheath

Based on your description alone, it sounds as if you have what is called a "Boxer's knuckle".
It often affects the middle finger, and can happen to "non-boxers", I am a ringside physician, so I see this fairly often. It is due to an injury to the tendon sheath over the knuckle. When you make a fist the tendon slips to the side. If it hurts, see your Dr. (preferably sports med or hand/ortho Dr)

In brief: Tendon sheath

Based on your description alone, it sounds as if you have what is called a "Boxer's knuckle".
It often affects the middle finger, and can happen to "non-boxers", I am a ringside physician, so I see this fairly often. It is due to an injury to the tendon sheath over the knuckle. When you make a fist the tendon slips to the side. If it hurts, see your Dr. (preferably sports med or hand/ortho Dr)
Dr. James Okamoto
Dr. James Okamoto
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1 comment
Dr. Stephen Scholand
Wow - that's an awesome 'virtual' diagnosis Dr. Okamoto!
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