A clinically tested product that temporarily weakens the muscles that gather your skin into folds, making it crease-proof enough to prevent wrinkles becoming established. A doctor can pinpoint which muscles to weaken. When injected, it attaches itself to the target muscle. Once it wears off, normally after about four months, the muscles regenerate so the skin returns to its state prior to the treatment.

About ten per cent of people say they get a headache within 24 hours of having the injections. Nobody knows why - it's not necessarily that it causes the headache. Headaches are normally short-lived, though, fading within 48 hours.

Whenever you scratch or pierce the skin enough to make it bleed, there is always the chance of inflammation. After your treatment you must not apply makeup or touch the area for a few hours as the wounds need time to heal.

• are taking muscle relaxants
• have a muscle-weakening disorder
• are pregnant
• are breastfeeding
• have alcohol in your system: the injections are more likely to give you bruises and alcohol can make the injections spread to muscles you don’t want to treat.