Crow's Feet: Causes & Treatment Options in Edinburgh

Crow's feet are the fine radiating lines that form at the outer corners of the eyes. They typically appear earliest among the facial wrinkles because the skin around the eye is thinner than anywhere else on the face, has fewer sebaceous glands to keep it supple, and is stretched hundreds of times each day by smiling, squinting and blinking. In the early stages the lines are dynamic, visible only on expression. With time they become static, etched into the skin at rest as well, particularly across the upper cheek and temple.

Several factors accelerate their depth. Ultraviolet exposure breaks down dermal collagen and elastin faster than ageing alone, which is why sun-exposed side of the face often shows deeper lines than the less-exposed side in drivers. Smoking produces its own pattern of periocular lines through both direct nicotine damage and repeated squinting from smoke irritation. Sleep deprivation reduces overnight dermal repair. Genetics set the baseline rate at which skin quality declines, and skin type influences how visible the lines become, with lighter phototypes tending to show static wrinkles earlier than deeper phototypes.

Treatment focuses on relaxing the underlying muscle rather than filling the line. Botulinum toxin (licensed UK brands include Botox, Azzalure and Bocouture) is the first-line option. Injected at low doses into the orbicularis oculi, the circular muscle that closes the eye, it reduces the repetitive creasing that produces the wrinkle. Effects begin at days three to five, settle at two weeks, and typically last three to four months. The dose used in the periocular region is lower than for the frown or forehead because the orbicularis is a relatively thin sheet of muscle, and responsible injectors map patient-specific smile patterns to avoid affecting the zygomaticus muscles below. For static lines that remain visible at rest, practitioners sometimes combine toxin with a light skin booster such as polynucleotides or a hyaluronic-acid biostimulator to improve skin quality directly.

Patients who are pregnant, breastfeeding, have a neuromuscular condition such as myasthenia gravis, or are on interacting antibiotics should not receive toxin until cleared by a prescriber. A thorough consultation also screens for ptosis risk, dry eye and previous eyelid surgery.