Skin tags that have changed color or bleed may require your doctor's evaluation and reassurance. Rarely, thrombosed skin tags may be a sign of another condition and need to be biopsied.
The x-axis and y-axis are two lines that create the coordinate plane. The x-axis is a horizontal line and the y-axis is a vertical line. I'm sure you've heard that a million times, but it might hard for you to remember which one is which. Here is a little trick to help you remember...
There is no stupid questions. Vertical as shown in the picture is a line going up or down, horizontal is a line going side to side. Vertical is up and down, horizontal is side to side, just think of the horizon and you can remember horizontal. Just think of the Horizon.