[...] before you heat up the wax or take out your tweezers, you need to have a clear understanding of what your eyebrows do (and yes, they do serve a purpose.) "The brow is meant to help define the face and frame the eyes," says Rich Monaco II, owner of Studio Brow Inc. in Trumbull. [...] remember: the first thing anyone should know about eyebrow shaping is that your brows are sisters, not twins! [...] when you're about to strip stray hairs from around your eyebrows, it's always best -- and most natural -- to follow the natural arch of each eyebrow. [...] take into consideration the shape of your face and your features, too, as they can help dictate the shape your eyebrow should be. Skin above the brow bone is slightly stronger than that below it, but both areas should be treated delicately before using any hair removal method, says Marria Pooya, managing partner at The Greenwich Medical Skincare & Not only can waxing stretch and pull the skin (which can increase your risk for wrinkles), but it also can remove the top delicate layers of skin. "If a waxing technician pulls the wax strip off incorrectly it may cause minor skin irritation," Monaco says. "Threading is much gentler in lifting the hair follicle directly from the root without the use of any chemicals, sharp metal instruments or unnecessary tugging on delicate skin," Pooya says. "People who have over-plucked for years will start to notice the hair stops growing back," Monaco says.