What should you know about angry forehead lines?

Vertical creases between the eyebrows develop when the frowning muscles repeatedly pull the brows inward and down. Horizontal forehead lines form when the forehead muscle raises the eyebrows. Depending on facial anatomy and the balance between these muscle groups, the lines may make a relaxed expression appear stern, worried or tired even when that does not match your mood.

Lines that appear only during expression are called dynamic lines. Over time, reduced skin elasticity and repeated folding can leave a crease visible while the face is resting. Sun exposure, smoking, dry skin and natural changes in collagen can make the texture more noticeable, but the pattern varies from person to person.

Daily broad-spectrum sunscreen, moisturiser and avoiding smoking can help limit further skin ageing. A retinoid may gradually improve fine surface lines, although it can irritate sensitive skin and is not suitable for everyone, including during pregnancy. A dermatologist can help choose a formulation that fits your skin and current medicines.

Botulinum toxin injections can relax selected frowning or forehead muscles for a temporary softening effect. Placement matters: treating one muscle group changes the balance of brow movement, so assessment should include brow position, eyelid heaviness, facial symmetry and the expressions you want to preserve. Established creases may remain visible even when muscle movement is reduced.

Forehead lines alone are generally a cosmetic concern. Seek urgent medical care if a new change in facial appearance comes with one-sided weakness, facial drooping, difficulty speaking, a severe sudden headache, loss of vision or new double vision. These symptoms need assessment for causes unrelated to ordinary expression lines.

Arrange a routine skin examination if a crease contains a sore that does not heal, repeated bleeding, a changing growth or persistent scaling. Before any injectable treatment, disclose pregnancy, breastfeeding, medicines, previous facial procedures, muscle or nerve disorders, and any infection or inflammation near the planned injection sites.

Ask which muscles are creating your particular line pattern, whether your lines are dynamic or also present at rest, and how treatment could affect brow height and natural expression. It is also useful to discuss expected temporary effects, aftercare, reasons to postpone treatment and what result would be realistic for an established crease.