More than likely it is an extra piece of cartilage.
An insect bite is a possibility.
Also an answer: any number of things can cause that, could also be an allergic reaction to something. You didn't say whether it was painful or not. Best to seek medical care if it lingers and does not go away.
There are some studies that have been completed that theorize a crease behind your ear means you are at risk of heart disease. Other than that, having a crease behind your ear means nothing.
The line behind which batsmen must stand is called the "crease." There are two main creases: the "popping crease," which marks the area the batsman must reach to be safe from being run out, and the "bowler's crease," which indicates where the bowler must deliver the ball from. The crease is essential for determining the legality of runs and dismissals in cricket.
On the 2.4L it is behind the oil pan, on the crease of the engine.
Usually, that is a sebaceous cyst... Not normally associated with headaches. Google "sebaceous cyst"...
Front on bowling action is where the back leg is behind the popping crease and front leg is facing the batsman.
The prefix of "crease" is "un-".
in a crease marking what are the crease edges with all the crease?
A crease between your butt
wrinkle, fold
Jimmy Crease was born in 1949.
Malleus Crease was created in 1996.
One rule is that once you start the bowl, you can't stop in the middle of it. Another one is that you have to bowl behind the crease or it will be a no ball.