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...
The vertical axis on the graph is your y- axis. Your y-axis is where you plot your y-intercept, or starting point, when you are graphing. In other words, your y-axis is the up and down line on your graph. Where the red line intercepts with the two is your y-axis.