Wrinkle Treatment: Causes, Types and Methods Overview

Wrinkles are indentations and furrows in the skin caused by muscle contractions (expression lines), collagen loss (static wrinkles) and the effects of gravity (gravitational wrinkles). While wrinkling is a natural part of skin ageing, for many people it represents an aesthetic concern that affects their confidence. From fine crow's feet around the eyes to deep forehead creases or nasolabial folds, modern aesthetic medicine offers a broad spectrum of treatment options — from minimally invasive injection procedures and laser treatments to surgical interventions. This comprehensive guide explains which types of wrinkles exist, the biological mechanisms behind skin ageing, how wrinkles can be reduced or removed, and which method is best suited to which situation.

Types of Wrinkles: A Clinical Overview

Expression Lines (Dynamic Wrinkles)

Expression lines, also called dynamic wrinkles, form through repeated muscle contractions in the face. Every smile, frown or blink activates specific facial muscles that crease the overlying skin. In younger years this creasing disappears when the muscle relaxes. With age, however, the skin loses elasticity as collagen and hyaluronic acid reserves diminish — and the line becomes permanently visible even at rest.

Typical expression lines include:

Forehead lines (horizontal lines from raising the eyebrows)
Glabellar lines ("frown lines" or "11s" between the eyebrows)
Crow's feet (fan-shaped lines at the outer corners of the eyes from smiling and blinking)
Bunny lines (small transverse lines on the nose bridge)
Perioral lines (vertical lines around the mouth from pursing the lips)

Expression lines generally respond very well to Botox treatments, as botulinum toxin specifically relaxes overactive muscles and reduces line formation.

Static Wrinkles

Static wrinkles are visible even without muscle contraction — they exist at rest. They arise from age-related loss of collagen and hyaluronic acid and from the loss of subcutaneous fat tissue. External factors such as UV radiation, smoking and oxidative stress also play a significant role.

Classic static wrinkles include:

Nasolabial folds (running from the nose wings to the mouth corners)
Marionette lines (running downward from the mouth corners toward the chin)
Tear trough (hollow area beneath the lower eyelid)
Periorbital fine lines (fine wrinkles around the eyes)

Hyaluronic acid fillers are particularly suitable for static wrinkles, as they replace lost volume and plump the skin from within.

Gravitational Wrinkles

Gravitational wrinkles form mainly through the descent of fat and tissue structures under the influence of gravity and weakening ligamentous support. Facial volume shifts downward and inward over the years, leading to typical changes in facial architecture: the jaw line becomes less defined, jowling develops — hanging cheek pads that override the mandibular line — and the neck loses its youthful contour.

Gravitational wrinkles can be addressed with non-invasive procedures such as Ultherapy or with surgical methods such as a facelift. Filler therapy alone is insufficient for advanced gravitational changes.

Biological Causes of Skin Ageing

Collagen Loss and Declining Skin Elasticity

Collagen is the skin's principal structural protein, comprising approximately 70–80% of dry skin mass. It provides firmness, resilience and structural integrity. From the age of around 25, the body's collagen production begins to decline by approximately 1% per year. During and after menopause this process accelerates dramatically in women: in the first five years after menopause, the skin can lose up to 30% of its collagen content. Simultaneously, elastin production declines, reducing the skin's ability to snap back into shape. The result is thinner, looser skin with less resistance — the scaffold beneath the surface breaks down, and wrinkles form.

Hyaluronic Acid Loss and Moisture Deficit

Hyaluronic acid (hyaluronate) is a naturally occurring glycosaminoglycan that can bind up to 1,000 times its own weight in water, making it the skin's most important natural moisture-retaining factor. From around age 30, hyaluronic acid content in the skin steadily declines. By age 50, the skin has lost roughly half its original hyaluronic acid. The result: drier, thinner, duller skin with more visible lines. The characteristic "crinkled paper" appearance of very mature skin is directly linked to significant hyaluronic acid loss.

UV Radiation and Photoageing

UV radiation is the most important extrinsic factor in skin ageing. Studies suggest up to 80% of visible facial skin ageing is attributable to chronic UV exposure — a phenomenon known as photoageing. UVB rays damage the DNA of skin cells directly. UVA rays penetrate more deeply into the dermis, activating matrix metalloproteinases (MMPs) that break down collagen and elastin. UVA radiation is active even through clouds and window glass. Consistent sun protection from an early age is the single most effective measure against photoageing.

Smoking and Oxidative Stress

Smoking accelerates skin ageing on multiple levels. Cigarette smoke contains massive quantities of free radicals that trigger oxidative stress, attacking and destroying cell structures, DNA and proteins including collagen. Smoking also causes vasoconstriction, reducing microcirculation in the skin and limiting its capacity to receive oxygen and nutrients. Smokers demonstrably develop deeper and earlier wrinkles than non-smokers, particularly perioral lines from the pursing motion and crow's feet from squinting in smoke.

Hormonal Changes and Intrinsic Ageing

Intrinsic or chronological skin ageing is genetically programmed and unavoidable. It is significantly influenced by hormonal changes. Oestrogen stimulates collagen and hyaluronic acid production and promotes skin hydration. As oestrogen levels fall during menopause, skin ageing accelerates noticeably. The age-related decline in growth hormone (HGH) and IGF-1 also negatively affects skin quality, as these hormones are important regulators of skin renewal and collagen synthesis.

Wrinkles by Facial Zone

Forehead Lines

Horizontal forehead lines are caused by the activity of the frontalis muscle (responsible for raising the eyebrows). Glabellar lines (frown lines or "11s") are produced by the corrugator supercilii, procerus and medial orbicularis muscles pulling the eyebrows together. Glabellar lines often give the face a stern or tense expression even when relaxed. Both types respond excellently to botulinum toxin injections. For deeply etched static components, small amounts of hyaluronic acid can be added.

Eye Area: Crow's Feet and Tear Trough

The periorbital region ages particularly quickly, as the skin here is only about 0.5 mm thick and lacks sebaceous glands. Crow's feet radiate from the outer corner of the eye and are caused by the orbicularis oculi during smiling and blinking — often the first visible signs of ageing. The tear trough (nasojugal fold) is a depression running from the inner corner of the eye downward and outward, caused by volume loss and ligamentous tension. Dark shadows make the face look tired and older. Treatment requires great precision and should only be performed by experienced physicians using fine-consistency hyaluronic acid.

Mouth Area: Nasolabial Folds and Marionette Lines

Nasolabial folds run from the nose wings to the mouth corners and arise from a combination of volume loss in the cheek pads, skin laxity and the activity of lip-elevating muscles. An important caveat: simply filling the fold itself may not fully address the problem if there is significant mid-face volume loss — comprehensive cheek volume restoration is often necessary. Marionette lines run vertically downward from the mouth corners toward the chin, creating a sad, downturned expression. Treatment combines hyaluronic acid filler with possible botulinum toxin injection into the depressor anguli oris muscle. Perioral lines are vertical lines above and below the lips, treated with botulinum toxin, hyaluronic acid and laser procedures.

Neck and Décolleté

The neck and décolleté often reveal true age more reliably than the face — these zones are frequently neglected in skincare and heavily exposed to UV. Common changes include horizontal neck lines, platysmal bands (vertical muscular cords visible on the neck), general tissue laxity, and décolleté wrinkles from side-sleeping and sun damage. Treatment options include botulinum toxin for platysmal bands (Nefertiti Lift), hyaluronic acid, laser, Ultherapy and surgical neck lifting.

Botox for Expression Lines

Botulinum toxin type A (known under brand names such as Botox, Dysport or Xeomin) is the most performed aesthetic procedure worldwide. It is a highly purified protein produced by Clostridium botulinum that, in minimal medically controlled doses, blocks neuromuscular transmission and specifically relaxes overactive muscles.

Mechanism of Action

Botulinum toxin inhibits the release of acetylcholine at the motor end plate — the junction between nerve and muscle. With acetylcholine release blocked, the muscle cannot contract. The effect sets in after 2–14 days and lasts between 3 and 6 months depending on the treated area, the product used and individual factors. Importantly, botulinum toxin relaxes muscles but does not fill wrinkles — it is therefore primarily suited to dynamic expression lines. In already-etched static lines it can prevent further deepening but does not achieve complete smoothing.

Treatment Regions

Forehead: Horizontal lines and glabellar frown lines
Eye area: Crow's feet
Eyebrow lift: Targeted relaxation of brow-depressing muscles lifts the brows slightly
Neck: Platysmal bands (Nefertiti Lift)
Bunny lines: Transverse nose lines
Chin: Pebbled or "orange peel" chin texture
Lips: Perioral lines and subtle lip flip

Safety Profile and Possible Risks

Botulinum toxin treatments have an excellent safety profile when performed by qualified physicians. Possible side effects are generally temporary: mild bruising, rare nausea, headache in the first hours, brow ptosis (hanging eyebrow — rare, transient), lid ptosis (drooping upper lid — very rare, from incorrect toxin diffusion). Contraindications include pregnancy, breastfeeding, neuromuscular diseases such as myasthenia gravis, and active infection at the treatment site.

Hyaluronic Acid Fillers for Volume Loss

Hyaluronic acid fillers are among the most popular and safest filling materials in aesthetic medicine. Unlike botulinum toxin, they restore lost volume, smooth deep wrinkles and contour the face. Since hyaluronic acid is a naturally occurring substance in the body, the allergy risk is extremely low.

Properties and Varieties

Modern fillers use hyaluronic acid produced by bacterial fermentation and stabilised through cross-linking — a process that links individual HA chains into a three-dimensional gel network, slowing breakdown. Depending on the degree of cross-linking and particle size, fillers range from soft, thin formulations for fine lines and delicate areas (tear trough, fine lip lines) through medium-density products for nasolabial folds and moderate volume, to stiff, high-viscosity formulations for deep volume deficits, cheek augmentation and contouring. Well-known brands include Juvederm, Restylane, Belotero and Teosyal.

Treatment Areas and Costs

Treatment	Approximate Cost
Botox (per area)	€150–350
Hyaluronic acid filler (per syringe)	€350–600
Tear trough filler	€400–700
Cheek augmentation	€600–1,200
Fractional laser resurfacing	€400–1,200 per session
Microneedling (RF)	€300–800 per session
Chemical peel (medium depth)	€200–600
Facelift	€7,000–15,000

Laser Treatments: Fraxel and CO2 Laser

Laser skin resurfacing uses concentrated light energy to precisely remove damaged outer skin layers and stimulate collagen production in the dermis. Two main categories are used for wrinkle treatment:

Fractional lasers (Fraxel): Treat only a fraction of the skin surface at a time, leaving surrounding tissue intact to promote faster healing. Suitable for fine to moderate wrinkles, uneven texture, pigmentation and acne scarring. Downtime: 3–7 days of redness and peeling per session. Multiple sessions may be needed.

Ablative CO2 laser: Removes the entire outer skin layer in the treated area, achieving the most dramatic resurfacing results. Best for moderate to deep wrinkles, significant photoageing and acne scars. Downtime: 1–2 weeks of intensive recovery. Results are long-lasting.

Microneedling and RF Microneedling

Microneedling uses fine needles to create thousands of micro-injuries in the skin surface, triggering the body's wound-healing response and stimulating collagen and elastin production. Results are subtle but real with a course of treatments. RF (radiofrequency) microneedling adds radiofrequency energy delivered directly into the dermis via the needles, achieving significantly greater skin tightening than needling alone. Both methods are suitable for skin texture, fine lines, mild laxity and large pores. Downtime is minimal — typically 24–48 hours of redness.

Chemical Peels

Chemical peels apply acidic solutions to the skin to remove the outer dead layers and promote cell renewal. Three depths are distinguished:

Superficial peels (glycolic acid, salicylic acid): Brighten, smooth texture, minimal downtime. Need a course for results.
Medium-depth peels (TCA 20–35%): Address fine to moderate wrinkles, age spots and mild acne scarring. 5–7 days of peeling and redness.
Deep peels (phenol, TCA 50%): Dramatic results for deep wrinkles, but significant downtime and requires precise medical supervision.

Surgical Methods: Facelift and Brow Lift

When gravitational changes are pronounced — jowling, significant facial tissue descent, deep nasolabial and marionette lines, and neck laxity — non-surgical treatments provide only temporary or partial improvement. Surgical procedures address the underlying structural changes directly.

Facelift (rhytidectomy): Lifts and tightens the facial soft tissues and skin, repositioning descended structures. Modern SMAS-based techniques work at the deeper muscular layer (SMAS), not just the skin, producing natural and long-lasting results. Duration: 3–5 hours under general or sedation anaesthesia. Results last 7–12 years on average.

Brow lift (forehead lift): Elevates descended eyebrows, smooths forehead and glabellar lines, and opens up the eye area. Performed endoscopically (minimally invasive) or via open technique depending on the degree of ptosis. Often combined with upper or lower blepharoplasty.

A qualified consultation with a board-certified plastic surgeon will determine which combination of surgical and non-surgical treatments is optimal for each individual's anatomy, age and aesthetic goals.