Laser advice in short videos: four questions to ask before using it

A video’s popularity says nothing about the strength of its evidence. Before applying advice about preparation, settings, aftercare or device choice, check the source, context, omitted risks and the author’s interests.

Question one: who is speaking and what evidence do they cite?

The name of the profession in the profile, a white coat and a confident tone do not replace verification of qualifications. It is useful to open the original source: the current IFU for the specific device, regulatory guidance, a professional manual or peer-reviewed study. A screenshot of a paragraph without a title or link gives no context about the population, method, and limitations.

If the author says “research has proven”, look for the study itself and see what exactly it studied. One small case or personal account does not establish universal effectiveness or complication rates. A review can combine different devices and protocols, so its average does not become a promise for a specific person.

Question two: which device and clinical situation?

Advice about a specific setting does not carry across device models. Wavelength, pulse duration and pulse structure, spot size, cooling, contact and technique interact. Even the same “diode” label does not make platforms interchangeable. Treatment decisions must follow the current device IFU, operator training and an in-person assessment of the area.

You also need to check what kind of skin, hair and area you are talking about. The recommendation for dense, dark hair on the lower leg does not describe fine hair on the face. Recent tanning, medications, inflammation, and previous reactions change the context. If a video doesn't state the boundaries, it doesn't make the rule broad, it makes it incomplete.

• Open the named source and check the date, author and document type.
• Find the exact model, technology, treatment area and characteristics of the study participants.
• Note risks, exceptions, duration of observation and data missing from the video.
• Check whether the video promotes a course, device, training, cosmetics or an affiliate link.

Question three: what context was edited out?

The video may show an immediate visible hair change, redness or one successful shot, but not subsequent regrowth and complications. A visible reaction is not necessarily proof of the result. The length of follow-up, the number of participants who dropped out, adverse events and the method of measurement are important. Before and after should be comparable in light, scale and time.

Advice to treat through a tan, tattoo or suspicious lesion, or to remove eye protection to reach a nearby area, is particularly concerning. A suspicious skin lesion, active infection, skin damage or possible eye exposure requires an appropriate clinical pathway, not an online shortcut. Advice in the comments does not replace clinical judgement.

Question four: who benefits from the conclusion?

Commercial interest does not make information false, but it does require transparency. A manufacturer may describe its platform within the limits of its documentation, but does not prove its superiority over all technologies with one demo video. The clinic can show the process, but must separate education from advertising claims.

After review, advice receives one of three statuses: supported principle, issue requiring IFU review, or unsuitable guidance. There is no need to argue with the author in the comments. The team saves the link, original source and concise assessment in the training database. A viral video then becomes a prompt to improve evidence literacy, not an excuse for an unauthorised protocol change.