How long are your appointments and how large of an area is being treated?
When one works in the bikini area, it is usually for a couple of hours at a time, working contiguous hairs, stretching the skin, a bruise can happen. This can take about a week or more to fade as it changes color.
However, if you have the area cleared and had been feeling tweezed during the first year and still have lots of hair in the area, it could very well mean that you were being tweezed a great deal, especially in light of the fact that you indicated that you are not feeling the tweezing with the current electrologist.
If you are actually feeling the insertions but not tweezing, your electrologist might be using a thick needle on your bikini area. How does the scabbing from electrologist #1 compare to electrologist #2?
If you are located in an area where you have access to other electrologists, check them out.
Being tweezed is not okay, an occassional black and blue is understandable in certain situations but since most hairs are in anagen, you shouldn’t feel tweezed 50% of the time as you idicate.