“The glabellar area (the medical term for the region between the eyebrows) is actually a very common place for people to break out,” says Lee. “This is because it’s part of your T-zone (which starts at your forehead and follows down the length of your nose and ends at your chin). The T-zone is one of the oiliest areas of your face because it has the highest concentration of sebaceous glands.” And in this case, more sebum equals more problems.
“Sebaceous glands empty into your pores and can clog your hair follicles causing inflammation. So, if you notice, acne really only occurs where there are hair follicles and not so much on the non-hair-bearing areas of your skin—like the palms of your hands, soles of your feet, or along your mucous membranes (i.e. your lips or the insides of your nose and mouth),” says Lee.
And one of most common culprits for between the brow bumps is…drumroll…tweezing. Or waxing. Or really any of the hair removal you do to keep that unibrow in check. As Lee further explains: “When you pluck (or wax or thread) your hair, you pull it out at the root. As it grows back, it needs to grow a little bit under the skin before it projects beyond the surface. If the incoming hair gets trapped underneath the skin during this process, it becomes “ingrown,” and appears as a pimple-like bump.”