Sometimes AFTER I get my eyebrows waxed I can see a very defined line where the hair was removed. Typically it doesn’t go away for at least a week, sometimes even two. Any ideas why this is?

It's hard to say exactly why you can see a very defined line along your brow, but the first thing that comes to mind is that this is probably a tan line.

The first question I have for you is how frequently are you waxing your brows? You also mentioned that this only happens to you  “sometimes.” So, my second question would be to see if you notice this line only if it has been a longer period of time since your previous wax.
 
Also, you may notice this line in the summer months more or if you are exposed to the sun.
 
My guess is that this line doesn't go away for a week to two weeks, enough time for which the new skin is exposed to the sun and has a chance to get "some color" or that the skin surrounding the new skin has faded in color.

My advice to you to help minimize this issue is:

1.    Get brow shaping’s on a more regular basis. I recommend every 2-6 weeks depending on how fast your hair grows.

2.    You could play with make-up to try and blend this line.

3.    Try a self-tanner, but be very careful if you go this route, it will be hard to match your skin tone.

I hope this answers your question and these tidbits help!

Always,

Summer
Waxing the City- Dallas