A scar on the neck almost always comes from one of a few causes: surgery, a medical procedure to help with breathing, trauma, or removal of a cyst or skin lesion. The most common reason by far is thyroid surgery, which accounts for well over 100,000 procedures a year in the United States alone. But the size, shape, and exact position of a neck scar can tell you a lot about what caused it.
Thyroid Surgery
Thyroid surgery is the single most common reason for a horizontal scar across the lower front of the neck. Surgeons estimated roughly 169,000 thyroid-related procedures were performed in the U.S. in 2016, and that number has continued to grow. The operation is done to treat thyroid nodules, goiters, overactive thyroid, or thyroid cancer.
The incision is typically made in a horizontal line about 2 cm above the notch at the top of the breastbone, following a natural skin crease. This placement helps the scar blend in over time. A healed thyroid surgery scar usually looks like a thin, slightly pale line running across the base of the throat, sometimes 2 to 4 inches long depending on the extent of the operation. On some people it becomes nearly invisible within a year; on others it remains a faint but noticeable line.
Spine Surgery on the Neck
A scar on the front of the neck, off to one side, often comes from a cervical spine procedure called an anterior cervical discectomy and fusion. This surgery treats herniated discs or compressed nerves in the neck by going in through the front rather than the back. Surgeons make a small incision on the side of the neck, and the resulting scar is typically short and positioned where it won’t be clearly visible. If someone has a scar along the side of their neck near the midline, this is one of the more likely explanations.
Tracheostomy
A round, dimpled scar in the center of the lower neck is the hallmark of a tracheostomy, a procedure where a tube is placed directly into the windpipe to help someone breathe. This is done during emergencies, prolonged time on a ventilator, or conditions that block the airway.
What makes a tracheostomy scar distinctive is its shape. Unlike surgical incisions that are stitched closed, a tracheostomy site is left to heal on its own after the tube is removed. The tissue fills in gradually, and fibrosis causes the skin and underlying layers to contract inward. The result is a depressed, sunken scar that’s often tethered to the windpipe beneath it. People with healed tracheostomy scars sometimes notice the scar moves when they swallow or turn their head, a phenomenon called “tracheal tug.” This can cause discomfort with neck movement and emotional distress over the scar’s appearance.
Carotid Artery Surgery
A vertical or slightly curved scar running along one side of the neck, roughly 4 inches long, typically comes from a carotid endarterectomy. This procedure clears plaque buildup from the carotid artery to reduce stroke risk. The scar runs along the front edge of the large neck muscle and usually becomes less noticeable within a few months. Because this surgery is most common in older adults with cardiovascular disease, you’re more likely to see this scar on someone middle-aged or older.
Cancer-Related Neck Surgery
When cancer spreads to the lymph nodes in the neck, or when head and neck cancers need to be removed, surgeons perform what’s called a neck dissection. These scars tend to be larger and more complex than other neck scars. The most common pattern is a “hockey stick” incision that curves from behind the ear downward and then forward across the neck. In some cases, a Y-shaped extension is added to reach lymph nodes in the lower or back portions of the neck. Another approach uses two parallel horizontal incisions. These scars are often the most visible because the surgery involves removing tissue across a wide area.
Cyst or Skin Lesion Removal
Small, isolated scars on the neck frequently come from the removal of sebaceous cysts (also called epidermoid cysts) or skin lesions. The neck is a common site for these cysts, which sit just beneath the skin and can become inflamed or infected. Removal is a routine outpatient procedure, and the resulting scar is usually small, often less than an inch. Scars from mole removal or skin cancer excision look similar: a short, thin line, sometimes with tiny dots on either side where stitches were placed.
Trauma and Accidents
Not all neck scars come from planned procedures. Car accidents can leave scars from seatbelt friction or from glass and debris. When a seatbelt rides up and contacts the neck during a collision, it can cause bruising, abrasions, and in some cases lacerations that leave permanent marks. Visible seatbelt marks on the neck occur in fewer than 5% of crash patients, but when the belt does contact the neck, the injuries can range from surface abrasions to deeper tissue damage requiring surgical repair.
Other traumatic causes include cuts from falls, workplace accidents, assaults, and burns. These scars tend to be more irregular in shape compared to the clean, straight lines left by surgical incisions.
How Neck Scars Change Over Time
Neck scars go through a predictable healing process that takes about a year to complete. In the first few weeks, a surgical scar looks red, raised, and swollen. Over the next one to three months, it gradually flattens and the redness fades. By three to six months, most scars have become noticeably smoother and closer in color to the surrounding skin. Full maturation happens around the 12-month mark, when the scar takes on its final appearance.
Some people heal with thicker, raised scars called hypertrophic scars or keloids. Laser treatments can improve these significantly. Pulsed dye laser therapy, the most common option for raised scars, has shown 57% to 83% improvement in appearance and texture after just one to two sessions. Other laser types can improve pigmentation and thickness by 26% to 75% over two to three sessions spaced a month apart. Surgical scar revision is generally considered only after a scar has fully matured, usually at least 12 months after the original procedure, and only when less invasive treatments haven’t worked.
The neck’s skin is relatively thin and moves constantly with swallowing, speaking, and turning, which makes it a challenging area for scarring. Scars placed along natural skin creases tend to heal best, which is why surgeons choose those locations whenever possible.