Widow's peaks and temporal recessions are distinct features that can be modified through hairline surgery.

A widow's peak is the pointed area at the center of the hairline, while temporal recessions refer to the areas that recede on the sides.

For patients with a pronounced widow's peak, the hairline can be reshaped by removing the triangular peak and advancing the hairline forward.

Temporal recessions are more challenging due to the tension in these areas, especially during Halo surgery, which may limit the degree of advancement possible.