Gua sha, rollers, LED devices and microcurrent tools are different categories. A generic tool guide cannot promise lifting, lymphatic drainage, acne treatment or collagen production.
Separate manual and powered tools
Manual tools require gentle technique and cleaning. LED and microcurrent devices require model-specific instructions, contraindications and evidence; do not generalize from one device to another.
Check suitability before use
Avoid use over broken or infected skin and follow the exact device manual. Ask an appropriate professional about photosensitivity, implanted devices, pregnancy, medication or a medical condition.
Hygiene reference
See the facial-tool cleaning guide.
Editorial limits
This guide is informational. Formulas, regulations, packaging and seller information can change, so verify current labels and official sources before relying on a claim.

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