Noticing two vertical lines between your eyebrows can be an unwelcome surprise, especially if you have a consistent skincare routine. Known as 11 lines, these creases are a common feature of facial aging and often become more noticeable over time.

The lines, which are medically called glabellar lines, develop in an area of the face that moves frequently. Frowning, concentrating, squinting and other repeated expressions can contribute to their appearance. As skin gradually loses collagen and elasticity, temporary creases can eventually become visible even when the face is relaxed.

While 11 lines are a completely normal part of aging, there are several ways to help delay their development or make existing lines appear softer.

What exactly are 11 lines?

11 lines are vertical creases that form between the eyebrows. The nickname comes from their resemblance to the number 11, particularly when two distinct lines appear side by side.

At first, these creases may only become noticeable when the eyebrows move. With years of repeated facial movement, however, they can become more persistent.

Two muscles play an important role in creating these expressions. The corrugator supercilii draws the eyebrows inward, while the procerus pulls the skin between the brows downward. Repeated contraction of these muscles, combined with changes in the skin, can eventually make the lines more visible.

Why do 11 lines develop?

Facial movement is only one piece of the puzzle. The skin naturally produces less collagen and elastin as people age, reducing its ability to bounce back after repeated expressions.

Sun exposure can also accelerate visible signs of aging by contributing to changes in collagen and skin elasticity. Genetics, skin thickness, hydration, nutrition and individual facial expressions may influence how early or prominently the lines appear.

Some people may notice these creases relatively early, while others maintain smoother skin between the eyebrows for much longer.

Are 11 lines inevitable?

Almost everyone will develop some degree of facial lines eventually, but the timing and severity vary considerably.

People with thicker or more elastic skin may develop less noticeable creases. Consistent sun protection can also help limit premature changes caused by ultraviolet exposure.

That means developing it, is not necessarily a sign that someone has neglected their skin. They are a normal consequence of facial movement and the natural aging process.

Can skincare prevent 11 lines?

A consistent skincare routine can help protect the skin and potentially delay the appearance of more pronounced lines, although creams cannot completely erase deeply established creases.

Daily sunscreen is one of the most important steps because ultraviolet exposure contributes to premature skin aging. Retinoids can support cell turnover and collagen production, while peptides are commonly used to support the skin’s structure. Hyaluronic acid can provide hydration and temporarily make skin appear fuller.

Moisturizer also has an important role in maintaining the skin barrier and reducing dryness that can make fine lines appear more noticeable.

The key is consistency. Skincare tends to provide gradual improvements rather than dramatic overnight changes.

Which professional treatments work?

For people who want more noticeable results, dermatology and aesthetic treatments offer several options.

Botulinum toxin injections are among the most established approaches for expression-related lines. By temporarily reducing the activity of the muscles responsible for repeated contractions, the treatment can soften existing lines and may help prevent them from becoming more pronounced.

Laser resurfacing is another option. Depending on the type of laser used, treatment can improve skin texture and encourage collagen remodeling.

Microneedling can also stimulate collagen production by creating controlled micro-injuries in the skin. Chemical peels work differently by removing portions of the outermost skin layer and encouraging new skin growth.

Dermatologists may recommend different approaches depending on whether the lines are visible only during facial movement or remain noticeable when the face is at rest.

What about fillers?

Fillers may sometimes be considered for certain static facial lines, but the area between the eyebrows requires particular caution.

Injecting filler near this region can carry serious complications, including the possibility of affecting vision. Because of those risks, filler is generally not considered the first choice for treating 11 lines.

Anyone considering an injectable treatment should have the procedure performed by a qualified medical professional who understands facial anatomy and can discuss the potential risks and benefits.

Can 11 lines disappear naturally?

Once 11 lines become deeply etched into the skin, skincare products alone are unlikely to completely remove them. Sunscreen, moisturizer and targeted ingredients can support healthier looking skin and may help slow further changes, but established creases may require professional treatment for a significant improvement.

Ultimately, there is nothing medically wrong with having 11 lines. They are a normal part of facial expression and aging. For those who would prefer to soften them, a dermatologist can help determine whether skincare, injections, resurfacing treatments or a combination of approaches makes the most sense.