Trigger finger is a little different than what you might think it is. It’s a condition that occurs when one of your fingers is stuck in a bent or straightened position, known as stenosing tenosynovitis. It happens when inflammation shrinks the space within the sheath that wraps around the tendon in the affected finger.
The condition can happen often with people whose work or hobbies require repetitive gripping motions. It’s also more likely to occur in women, and in people with diabetes. The treatment of this condition varies depending on the severity, ranging from inflammation-reduction to surgery.
They Get a Slight Advantage While Swimming
This is one of the more common traits on this list – it's likely someone you know has this feature, as it develops in one in two thousand live births. Webbed toes present most commonly as a connection between the second and third toes, with skin that extends higher. It can sometimes reach all the way to the end.
The specific cause of this condition is still a mystery. There is clearly some genetic component, as close family members can share the trait, but there are a number of possible reasons. If you have this condition, don't feel bad – Ashton Kutcher also has it.
Being Born Without a Bridge in the Nose
We all know that the bridge of the nose is the bony area, actually cartilage, that gives our nose shape. Some people have a low bridge, but others are bone without that cartilage at all. This is actually relatively common for people of Asian or African descent – or at least less rare.
The condition typically doesn't impair breathing, though a small amount of plastic surgery may be recommended to ensure proper airflow. Other than genetics, this can be due to genetic disorders, birth defects, or even infectious diseases.
A Singular Palmar Crease
Known as a simian crease (because it looks like a monkey might have it, we guess?), having one long crease across your palm is the result of the fusion of the two main palmar creases — the heart line and the head line. It's often found in people with a few abnormal medical conditions, but otherwise, perfectly healthy people can also develop it.
About 1.5% of the population has it in at least one hand. It's now known in the scientific community as the single transverse palmar crease. The most likely cause of this is fetal hand movement since the crease develops during the second month of pregnancy.
You've Heard of Being Left-Handed
How about being right-hearted? This rare condition forms the heart on the right side of the chest, and it's called dextrocardia. There are a few versions of the condition. The first is dextrocardia of embryonic arrest, which moves the heart further right than normal, and is associated with many heart defects.
Then there is dextrocardia situs solitus, with the heart on the right side of the chest but everything else is normal. Dextrocardia situs inversus has the heart being mirrored on the right side. There are more still. Surprisingly, most of these versions of the disorder don't present a big list of problems. About one in every twelve-thousand people develop this condition.