/ic/ - Artwork/Critique

Would anyone here know something about this:

When ever I try to draw anything, there's a natural tail to every curved line I draw. I normally draw digitally so I have a set stabilizer that gets rid of it, but traditionally and on anything less than the one stabilizer setting I use, all my curved lines have a natural tail.

The image posted shows what I mean. I've tested if it was just the program I used or if it was just me by drawing with pen/pencil and paper, and the tail always shows up. Why does my hand do this? How can I train my hand to stop doing this? It usually happens when I move my hand to leave the paper.