Flat forehead: assessing volume and projection

"My forehead is straight, with no curve, it looks like my face has no upper third." This concern is less frequent than a recessed chin, but it arrives with the same force: the patient looks at the profile photo and sees a vertical line between the hairline and the nose. Unlike wrinkles, a flat forehead cannot be corrected with toxin, and the professional has to think in terms of volume, projection, and bone.

This page treats the flat forehead as a question of volume and projection, and lays out the reasoning for deciding whether there is anything facial harmonization (HOF, in Brazil an orofacial harmonization specialty in dentistry) can do. Depressions and irregularities are covered in forehead depression, and the opposite, a forehead that projects too much, in prominent forehead.

What gives the forehead its curve

The forehead is made up of the frontal bone, covered by the frontalis muscle, a layer of fat called the frontal compartment, and the skin. The curve seen in profile depends mainly on the bone, and to a lesser degree on the volume of soft tissue. Young faces tend to have a gentle curve running from the hairline to the glabella, which changes over time as soft tissue is lost.

The glabella region and the superciliary arch form the transition to the eyebrows and the nose. The relationship with the nose is described by the nasofrontal angle, which strongly influences the profile. A flat forehead combined with an open nasofrontal angle gives a straighter profile, and the patient's concern often comes from there.

Where a flat forehead comes from

The first row is the most common and the least favorable for HOF: if the bone has always been flat, added volume creates a curve the patient never had, and that calls for a careful conversation about the patient's wishes and the risks. In the other rows, volume may restore part of the lost curve.

What volume can do

Hyaluronic acid, in small amounts and distributed with judgment, can soften the transition and restore a little curve. In the forehead the safety margin is narrow: the area is supplied by the supratrochlear and supraorbital arteries, which connect to the circulation of the eye. An occlusion can have serious consequences. That is why the decision and the technique belong to a licensed professional with specific training.

The procedure is described at review level in hyaluronic acid in the forehead. Complications and the emergency response are in vascular occlusion in the forehead.

Biostimulator and other options

In patients with thin skin or a gradual loss of quality and volume, the collagen biostimulator is discussed for selected profiles, with a gradual response and its own risks, such as nodules. Read biostimulator in the forehead for its limits. The skinbooster in the forehead comes up when the concern is skin quality rather than projection.

What about toxin in a flat forehead?

Botulinum toxin acts on the frontalis muscle and does not change the curve of the bone. In a flat forehead, relaxing the muscle can even accentuate the look of flatness, because the forehead loses movement and expression. A request for toxin to treat wrinkles should be considered separately. The frequent question is addressed in botox or filler in the forehead.

The effect on the profile

A flat forehead changes how the whole profile reads: the nasofrontal angle, nasal projection, the superciliary arch, and the chin form a line that the eye reads as harmonious or not. The forehead is not always the point that needs to change. In some patients, what looks like a flat forehead is a recessed chin or a very projected nose. See straight profile and concave profile for the neighboring readings.

How to organize the plan

1. Assess in profile, in three-quarter view, and with raking light.
2. Distinguish the bony part from the soft tissue part.
3. Talk about what the patient wants and show reference photos with caution.
4. If volume is indicated, plan a conservative amount with maximum attention to vascular anatomy.
5. Reassess with new profile photos.

How to use Harmy in this conversation

Harmy starts from a frontal photo and has no marking point for the forehead. The projection does not show the profile, which is where a flat forehead is seen. So for this concern the app does not illustrate the result and should not be used to suggest one. If the patient also has other concerns (cheekbone, under-eye area, temples), the app helps with those, but the forehead has to be handled with other references.

Questions to test your reasoning

What to record in the patient record

Record the profile photos, the palpation, the classification between bone and soft tissue, and the conversation about vascular risk and about the option of not treating. Note the specific consent for the forehead. For photos, see standardized clinical photography and, for the whole third, analysis of the forehead and hairline in the plan.

Frequent mistakes

The first mistake is assessing only from the front: a flat forehead is seen in profile. The second is underestimating the vascular risk of the area because it is considered a "simple injection". The third is promising a curve that the bone does not allow.

Summary for the decision

A flat forehead calls for profile assessment, palpation, and a conversation about what is bone and what is soft tissue. Volume can soften the transition, with a modest benefit and a real vascular risk. A biostimulator is a selected option, toxin does not change the curve, and the alternative of accepting the natural shape is legitimate. Keep hyaluronidase on hand, document, and act at the discretion of the licensed professional, in line with the rules of your professional council in Brazil, without promising results.