How to create a natural hairline: Design and hair flow in hair transplantation

A natural hairline cannot be achieved by simply lowering the position. It is created by combining the irregularity of the outermost line of the hairline (front edge), hair thickness, angle, and direction[1]Rather than focusing on the density numbers of transplanted hair, it is important to choose a position that accounts for how hair loss will progress in the future and matches facial features[2].

Is a straight, lowered hairline more natural?

No, a straight, lowered hairline does not necessarily look more natural. When the hairline is made straight and low, it can actually appear artificial. At the outermost edge of the hairline, we use small transplant grafts (grafts) with just one hair, and place grafts with several hairs together slightly behind. The design gradually increases hair density from front to back[3].

Why are angle and hair flow important?

Even with the same number of hairs transplanted, the appearance changes dramatically depending on whether the hair stands up or lies down. Therefore, at the hairline, it is important to create the angle and direction to match the natural hair flow and part line of the existing hair. Even in hairline transplantation for women, how to design the hair parting position has been reported as an important consideration[1].

Is the design different for M-shaped hairlines versus wide foreheads?

Yes, the design approach differs for M-shaped hairlines and wide foreheads. In the case of an M-shape, we consider how to connect it with the central hairline. For a wide forehead, the design considers both the height and width of the hairline. In reports addressing high and wide foreheads in East Asian women, not only the height of the forehead but also the horizontal contour (shape from the side) are considered[2].

What if we cannot lower the hairline as desired?

The lower the hairline is placed, the more grafts are needed. This reduces the donor area (where hair can be harvested) available for future use. To ensure there is no sparse area between the hairline and thinning at the back when future AGA (androgenetic alopecia) progresses, the position must be determined considering age and future progression patterns[4]Reference photos are used to share the shape as a visual concept. They do not guarantee that the hairline will be at the same position.

How to confirm the design during consultation

During consultation, we examine the contour not only from the front but also from diagonal and side angles. Please communicate your usual hair part and hairstyle to the doctor. Together with your doctor, confirm the grafts to be used at the outermost edge of the hairline, the direction of hair flow, the number of grafts needed, and how much future recession to plan for.