Neck skin folds at the same place every time you look down, and it takes sunlight outside the collar. A horizontal groove is the mark left by that folding and reduced elasticity; a vertical band stands out when the muscle at the front of the neck contracts.
Topical care and injections are decided after those two are separated. The injection that addresses each line differs.
3-line summary
1. Horizontal lines are addressed with hyaluronic acid; vertical muscle bands with Botox.
2. In pooled studies of hyaluronic acid for horizontal lines, the share treated again within 1 year was half.
3. Sunscreen is SPF 30 or higher, applied 15 minutes before going out, reapplied every two hours, and the screen is held near eye level.
Horizontal grooves and vertical bands
If a horizontal groove remains when you look at a relaxed neck, it is closer to texture and elasticity. If a vertical band rises only when you clench your jaw or tense the neck, it is the muscle at the front of the neck. The two types often overlap on one neck.
| Category | Horizontal groove | Vertical band |
|---|---|---|
| When they are seen | Groove remains even at rest | Rises as a band when the neck is tensed |
| Main cause | Repeated folding, reduced elasticity, accumulated sun | Contraction of the muscle at the front of the neck |
| Procedure looked at first | Hyaluronic acid injection | Botox |
Folding, sun, and muscle build up together
In measurements of the neck by age group, firmness and elasticity fell from younger groups toward older groups, and the distance the skin was pushed when the muscle moved increased. That is how the horizontal groove deepens.
Sunlight is a major environmental factor in skin aging. The neck is easier to miss with sunscreen than the face, and skin that sits outside the collar is exposed as it is.
When you look at a smartphone or tablet, the neck bends forward. There are records that measured device use together with the forward curve of the neck bones, and that posture repeatedly folds the same skin.
Sunscreen to the neck, screen at eye level
A groove that is already indented still has depth even if posture is corrected. Reducing future folding and sun accumulation is the same before a procedure and after it. The American Academy of Dermatology advises applying a product of SPF 30 or higher that blocks both ultraviolet A and B to uncovered skin 15 minutes before going out, and reapplying every two hours and right after swimming or sweating. The neck, under the ears, and the upper chest are included in those sites. How to choose a product can be followed in how to apply sunscreen every day.
Hold the screen near eye level, and raise the monitor to a height that does not make you look down. After washing, apply moisturizer to the neck along with the face.
Horizontal lines with hyaluronic acid, vertical bands with Botox
For horizontal grooves, injections that place hyaluronic acid shallowly in the skin have been used in several studies. In a pooled analysis, appearance scores rose, and the share treated again within 1 year was half. Reported reactions such as bruising, swelling, and tenderness were mild and short. Injection types that address texture can be checked in the skin booster types guide.
For vertical bands, Botox briefly reduces the muscle at the front of the neck so the band rises less. The scope of the U.S. authorization label is temporary improvement of moderate or greater bands of the muscle at the front of the neck in adults. The clinical studies that supported authorization were manufacturer trials. Contraindications are hypersensitivity to the formulation and infection at the injection site. Because it is an injection that reduces neck muscle, if there is a change in swallowing or speech, report it before the appointment. Dose and site can be followed in the Botox treatment guide and the Botox vs filler comparison.
If the jawline is blurred and neck skin looks lax, focused ultrasound (Ulthera) is marketed for lifting lax tissue under the chin and on the neck. In the public trial in the marketing document, adverse reactions were mild and short, and serious device-related events were tallied as 0 cases. The last time point in literature pooling mild to moderate laxity in women is 1 year. Mechanism and how it differs from facial sagging can be seen in the Ulthera treatment guide and the facial sagging improvement guide.
| Item | Hyaluronic acid | Botox | Focused ultrasound |
|---|---|---|---|
| Site addressed | Horizontal grooves and texture | Vertical muscle bands | Lax tissue under the chin and on the neck |
| What it does | Placed in the skin to address grooves and texture | Briefly reduces the muscle at the front of the neck | Gathers heat in deep layers to tighten |
| Schedule | Split across several sessions | After one session, again when force returns | After one session, seen over several months |
| Same-day reaction | Bruising, swelling, tenderness | Injection-site reaction, swallowing and speech | Redness, swelling, pain |
※ The hyaluronic acid retreatment rate is from an analysis that pooled several studies; the Botox range is from the U.S. authorization label; the ultrasound use is from the marketing document. Session count and product differ, so cost is given as a consultation estimate.
What to ask while looking at the neck before booking
Asking the items below as written separates which line and injection are discussed today.
- □ Whether a horizontal groove is visible on a relaxed neck, or a vertical band rises only when tensed
- □ Whether the jawline is blurred, only a horizontal groove is present, or both
- □ If Botox is used, how swallowing and speech are watched
- □ The depth and session count for hyaluronic acid
- □ Neck surgery or cervical pain, pregnancy or breastfeeding, inflammation at the injection site, anticoagulants
Temporary redness, swelling, and bruising at the injection site are shared. Shared precautions are in the treatment safety guide.
Frequently asked questions
Q1. Does a neck injection hurt?
It stings when the needle goes in. The neck bruises readily, and numbing cream is often applied before treatment. Avoid rubbing the site hard or using a sauna on the same day.
Q2. How many hyaluronic acid sessions are needed?
Rather than a one-session schedule, there are comparisons that place several sessions with an interval. One comparison conducted with manufacturer funding was three sessions at four-week intervals. Session count is set to the product and the depth of the groove.
Q3. How long do Botox neck bands last?
When muscle force returns, the band is visible again. The next appointment is set looking at both when force returns and a three-month interval.
Q4. Can a horizontal injection and Botox be done together?
A texture injection and a muscle injection have different targets, so they are sometimes placed in one plan. Whether they are done on the same day is decided after looking at where swelling would overlap.
Q5. Who postpones the appointment?
The appointment is postponed if there is inflammation at the injection site. Allergy to a Botox formulation, pregnancy or breastfeeding, neuromuscular disease, a state in which swallowing is already difficult, and anticoagulants are disclosed before booking.
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
- U.S. FDA: BOTOX Cosmetic approved label (2024)
- Syed R et al. (2026), J Cosmet Dermatol: Efficacy and Safety of OnabotulinumtoxinA for the Treatment of Platysma Prominence: A Systematic Review and Meta-Analysis of Randomized Controlled Trials (PMID 41612547)
- Wong ZY et al. (2026), Aesthet Surg J Open Forum: Efficacy and Safety of Hyaluronic Acid Fillers for Horizontal Neck Lines: A Systematic Review and Meta-Analysis (PMID 41560960)
- Jiang M et al. (2026), Clin Cosmet Investig Dermatol: Safety and Efficacy of Hyaluronic Acid-Based Filler for Neck Wrinkles: A Prospective, Multicenter, Randomized, Parallel-Controlled Non-Inferiority Trial (PMID 41873431)
- U.S. FDA: Ulthera System marketing summary (2012)
- Contini M et al. (2023), Int J Environ Res Public Health: A Systematic Review of the Efficacy of Microfocused Ultrasound for Facial Skin Tightening (PMID 36674277)
- Engerer N et al. (2022), Aesthetic Plast Surg: Aging of the Neck Decoded: New Insights for Minimally Invasive Treatments (PMID 35701594)
- Fisher GJ et al. (2002), Arch Dermatol: Mechanisms of photoaging and chronological skin aging (PMID 12437452)
- Öğrenci A et al. (2018), Open Access Maced J Med Sci: The Effect of Technological Devices on Cervical Lordosis (PMID 29610602)
- American Academy of Dermatology: how to apply sunscreen
Related reading
Discuss options for your current needs
We review your current health and prior procedures before explaining appropriate options and their limits.
