Facial hydrodermabrasion: principles, skin-type protocols, active ingredients and contraindications. A narrative review and technical guide for aesthetic professionals, with medical referral criteria

Narrative review and technical guide on facial hydrodermabrasion: technical foundations, adaptation by skin type, active ingredients of the working solutions, contraindications and medical referral criteria for aesthetic professionals. Unreviewed preprint. English version of the Spanish article deposited as an independent record and linked as a variant form.