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...
A horizontal line goes from the left to the right ( or from the right to the left ) like this : - - - - - - - - - - - - - - - - - - - - - - - - - - - - - A horizontal lin â¦e goes from a position that is low to a position that is high ( or from a position that is high to a position that is low ) like this : | | | | | | | | But the word  vertical  ...