I have no idea what it is, but when I was younger and first dating my now husband he noticed that I had one. What is it with you men and noticing things like that... and women are always saying that men never catch the little things!

I think it's kind of like a wrinkle.... a place where the skin creases a lot. It probably just happens from stretching and bending your arm. Just like yourself, I notice it mainly on my right arm. Maybe we sit with our arm bent a lot or something? I have no idea why some people have it and some don't. I know my husband doesn't.

I have the same thing, on both my forearms though, but i have always thought that mabye its just a little fat that is there, although i really am starting to doubt that now since i have very little fat in general...but i wrinkle sounds about right...

i have it on both arms, and i have often wondered what they are too....i just did a google search and found your question here, but so far no answers....though someone on another site thought they might signify that the bearer of these marks has some han chinese blood in them...i dunno 'bout that though...my blood lines are all european

i got them from rapid growth spirts. i actually had 1 real bad on one arm then another smaller one above it. they are slowly going away as i do forearm curls daily for a half an hour and rub cocoa butter on them. also, i was told alot of it has to do that some of us sleep with are arms folded. its weird cause as they dissappaer they get wider and worse

They can't be wrinkles, wrinkles are cause by contuinal movement in an area like the way the skin bunches up on your face when you smile over and over again. That doesn't happen when your bend your arm. They're not stretch marks because anyone with common sense knows what stretch marks look like and I've noticed these since I was 11 and broke my arm and I definitely didn't have stretch marks at 11. Also I had toned arms and saw no change.

A witch in Galicia told me years ago that those lines on the inside of the forearm near the elbow are a sign of Celtic blood. I'm Irish and have them, as do every other Irish person I've asked. Most people in Iceland (where I live) have them too. They are common in people from the north of Spain (which was once Celtic) but not in Spaniards from other parts of the country.

Hi, I have them too - on both arms between my elbow and wrist. Just showed up a few years ago and are more prominent in the summer. I asked the dermatologist - she just thought it was from the sun. They almost look like I burnt myself(but I didn't!).

I am a geneticist. The line near your elbow cross ways is a sign of shared ancestry with the historical central asian people who also became the Han Chinese. A colleague did a survey in the far east amongst chinese, korean, japanese etc. People in the UK vary - those from a scandinavian/viking origin often have the so called 'simian fold' - yes that is a confusing name as it is usually the used for the fold on your hand. I did a recent survey amongst a BA flight crew. 2 women and 1 man had the fold and 1 woman and two men did not. I have not seen it amongst ethnic indian or pakistani, nor african ancestry people.

I have a line on my arm to and I have always thought it was the wrinkle from being a chubby baby and toddler that made the impression. I looked at my baby photos and it corresponds to the same area.