Frown lines at 20: what they may mean

The vertical creases between the eyebrows may appear during concentration, bright light, or strong emotion before they become visible at rest. Some people naturally have more active brow muscles, thinner skin, or facial features that make a crease catch the light. Dehydrated skin and irritation can temporarily sharpen the appearance. Ultraviolet exposure can also affect skin texture over time.

Notice whether the lines disappear when your face is relaxed, whether they are linked to squinting, and whether there is redness or scaling. A sudden facial change with weakness or drooping is different from an ordinary expression line and needs medical attention.

Use sunscreen every day on exposed facial skin, wear sunglasses if bright light makes you squint, moisturise, and cleanse gently. Do not scrub the area or stack several strong actives at once. If you are considering a retinoid, ask a clinician how to introduce it and whether it is suitable for you; some people develop irritation before seeing any texture benefit.

At 20, conservative care and a clear understanding of the cause are often useful before considering an injectable. A dermatologist can discuss whether Botox or dermal fillers have a role, explain alternatives, and consider your medical history, expectations, and facial movement. Read about [Wrinkles](/symptoms/wrinkles/) and [Botox](/treatments/injectables/botulinum-toxin-injection/).

Get urgent help for sudden facial weakness, one-sided drooping, numbness, difficulty speaking, vision change, or a severe new headache. Book a skin assessment if the area has a persistent rash, a changing or bleeding mark, crusting, or a sore that does not heal. After treatment, report severe or worsening pain, spreading redness, pus, or visual symptoms promptly.

Ask whether the crease is present only with movement, which daily habits may be contributing, what gentle skincare fits your skin, and what risks, alternatives, and follow-up would apply to any procedure.