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The only thing that it doesn’t help is established spider or thread veins (telangiectasia). These can be treated with Intense Pulsed Light (IPL) or the Veinwave technique, which is based on microwave energy for thermo-coagulation of small veins.
In the United Kingdom, Azelaic acid is available as Skinoren cream. In rosacea, it is thought to work by reducing the quantity of free oxygen radicals. It also has an exfoliative and anti-comedogenic effect that works well for people who also have acne vulgaris, the common form of acne. Metronidazole antibiotic gel is an alternative treatment but it doesn’t work as well as Azelaic acid. Both are well-tolerated by most people, though some do have to stop treatment with Azelaic acid due to excessive dryness or irritation.
Azelaic acid has other advantages in terms of it being probably non-teratogenic, unlike the Vitamin A preparations like Tretinoin (although all medications should be avoided during pregnancy where safe and practical).