Forehead wrinkles are horizontal lines that crease each time you raise the eyebrows. Sunlight and age deepen those marks, and a groove that is already indented is hard to make shallower with topical care alone.
If they show only when you raise the brows, look at an injection that briefly reduces the muscle; if they remain at rest, look at texture and elasticity. Prevention starts with sunscreen on the forehead every day.
3-line summary
1. Horizontal lines are made by the muscle that raises the eyebrows, and a heavy eyelid uses that muscle more.
2. Apply a product of SPF 30 or higher that blocks both ultraviolet A and B to the forehead every morning.
3. Botulinum toxin (Botox) briefly reduces that muscle's signal. There is a record of facial expression lines becoming lighter, and eyelid drooping is listed together.
The skin creases horizontally when you raise the eyebrows
The eyebrows rise with surprise, concentration, and looking at a screen. Each time, forehead skin folds in the same direction, and when recovery weakens, that fold remains as a horizontal groove. If the eyelids are heavy, more force goes into the forehead to open the eyes, so the lines show more readily even at the same age.
Dermal collagen declines with age, and sunlight breaks that collagen down faster. The forehead sits outside a hat or bangs and is easy to expose to ultraviolet light. Lines that show only when you raise the brows, and lines that remain after expression is released, are addressed by different injections.
| When they are seen | What mainly makes them | What to address first |
|---|---|---|
| Only when raising the eyebrows | Repeated contraction of the muscle that raises the eyebrows | Habit check, Botox |
| A groove remains even at rest | Collagen decline, accumulated sun | Sunscreen, vitamin A, texture treatment |
| Look deeper in the morning | Pressure of the pillow on the forehead | Sleeping direction and pillow position |
※ The three types on one forehead often overlap. Eye-area lines can be separated by site in the eye-area wrinkle guide.
Apply sunscreen to the forehead every day
The American Academy of Dermatology advises using a product of SPF 30 or higher that blocks both ultraviolet A and B and that is water-resistant on skin not covered by clothing. It writes that consistent use reduces early signs of sun aging, including wrinkles. Apply it every morning even on cloudy days, covering the forehead, hairline, and temples. Application order continues in how to apply sunscreen every day and the skincare order guide.
In a study that divided middle-aged adults in Australia, the group that used sunscreen every day had slower progression of skin aging than the group that applied it only as needed. This study was conducted with government research funding.
Prescription vitamin A ointment has a record of lightening coarse wrinkles and blotches from sun. Stinging and flaking often follow in the first few weeks, so the amount is raised from a small start. If the screen is dark, the eyes squint and force goes into the forehead, so brightness and lens power are adjusted first. There is a survey in which tobacco smoke made forehead lines look deeper, and that survey was conducted with Botox manufacturer funding.
Lines already indented are separated into muscle and texture
Botox briefly reduces the signal of the muscle that raises the eyebrows, so the number of horizontal creases falls. An international review has a record of reduced facial expression wrinkles. The same review also notes eyelid drooping as a reaction.
The forehead muscle also holds eyebrow height, so if the injection site and amount are uneven, one eyebrow can remain raised or the eyes can look heavy. Muscle shape differs from person to person, so site and amount are matched. The injection mechanism and how it differs from filler can be checked in the Botox treatment guide and Botox vs filler comparison.
A groove that remains at rest is reviewed together with an injection or energy treatment that addresses texture and elasticity. A hollowed site is referred to a consultation that looks at volume.
| Item | Botox | Sunscreen · vitamin A |
|---|---|---|
| Lines addressed | Horizontal lines that deepen when raising | Future sun damage, remaining texture |
| What it does | Briefly reduces the muscle signal | Blocks ultraviolet light and smooths coarse texture |
| When it begins to show | Days to weeks | Daily; ointment over several weeks |
| Common reactions | Headache, injection-site redness, eyebrow or eyelid drooping | Stinging, flaking, dryness |
※ In a pooled analysis of upper-face injections, headache, skin reactions, and temporary muscle weakness were common, and most were mild and short. This analysis had no research funding.
Items to ask right away in a consultation
Separating movement from rest in what you describe helps with planning. Writing down the items below makes it easier to match dose and site.
- □ Do they show only when you raise the eyebrows, or does a groove remain at rest?
- □ Is there a habit of opening the eyes with the forehead because the eyes feel heavy?
- □ Do you apply sunscreen to the forehead and hairline every morning?
- □ Have you had Botox in the forehead or glabella before? When, and which product?
- □ Pregnancy or breastfeeding, inflammation at the injection site, hypersensitivity to this medicine, or eyelid drooping?
A history of neuromuscular disease, blood-thinning medicine, and facial infection are also disclosed before booking. Timing is covered in when skin aging starts.
Frequently asked questions
Q1. Does forehead Botox hurt?
There is a sting at the moment of injection. Headache and injection-site redness are common for a few days after, and eyebrow or eyelid drooping is reported right away.
Q2. How long does one session last?
The next injection is timed to when the line deepens again on raising the eyebrows. The interval is set looking at how fast the muscle returns.
Q3. Can it be done together with glabellar lines?
The forehead and glabella are neighboring muscles, so they are often planned together. Reducing only one side can tilt eyebrow height, so both sites are looked at at once and the amount is divided.
Q4. Who should disclose in advance?
Pregnancy or breastfeeding, inflammation at the injection site, a history of hypersensitivity to this medicine, neuromuscular disease, and existing eyelid drooping are disclosed before booking. Once disclosed, the appointment is postponed or switched to other care.
Q5. Can it be used preventively while the lines are still shallow?
If they crease only when raising, the injection reduces that repetition. A groove that remains at rest is a site for texture and elasticity. The shallower the line, the more sunscreen and habit come first, and the injection is chosen when folding repeats.
Results, duration, and suitability vary with individual skin condition, age, and lifestyle, and the same outcome cannot be guaranteed.
Procedures may cause temporary redness or swelling, and contraindications may apply, so please confirm these during your consultation.
This article is general information and does not replace individual medical care. Please confirm diagnosis and treatment suited to your condition during a consultation.
Sources
- American Academy of Dermatology: how to choose sunscreen — Body confirmed. SPF 30 or higher, simultaneous ultraviolet A and B block, water-resistant. Advises that consistent use reduces early signs of sun aging such as wrinkles. A consumer education page; trial design is not on this page.
- Hughes et al., sunscreen and prevention of skin aging (PMID 23732711) — Abstract confirmed. Australian community randomization, daily vs as-needed use, 4.5 years. Slower aging progression in the daily group. Government research funding. Some missing outcomes; power to detect a moderate effect was limited. No SPF number in the abstract.
- Camargo et al., review of botulinum toxin type A for facial wrinkles (PMID 34224576) — Abstract and plain-language summary confirmed. 65 randomized trials. Wrinkle reduction at 4 weeks, increased risk of eyelid drooping. Mean treatment period of 20 weeks is the study duration, not duration of effect. Forehead-only 2 papers; glabella is the majority. Duration and repeat interval: insufficient evidence. No author conflict-of-interest declaration. No retraction or expression of concern.
- Walker et al., forehead movement imbalance after Botox (PMID 34537780) — Abstract confirmed. Narrative review combining anatomy and clinical experience. Concludes that forehead muscle differs by person and matching is needed. No pooled sample analysis. No retraction or expression of concern.
- Zargaran et al., pooled analysis of upper-face cosmetic Botox complications (PMID 35178552) — Abstract and full text confirmed. 24 studies, injection sessions pooled. Overall reaction rate 16% (interval 8–26%, large heterogeneity between studies). Headache, local skin, and temporary muscle symptoms were common, and most were mild and transient. No author research funding. Definitions and reporting differ by study. No retraction or expression of concern.
- Sitohang et al., review of randomized trials of topical tretinoin for photoaging (PMID 35620028) — Abstract confirmed. 7 randomized trials. Reports of wrinkle and blotch improvement from an early time point. Formulations and assessment items differ, so they are hard to pool into one number. No author conflict of interest. No retraction or expression of concern.
- Goodman et al., survey of smoking, drinking, and facial aging in women (PMID 31531169) — Abstract confirmed. Self-assessment questionnaire. Association of smoking with forehead lines and others. Allergan funding, including manufacturer employees and advisers among the authors. A cross-sectional survey that does not assert causation. No retraction or expression of concern.
Related reading
Sources
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