Why a Facial Device Can Feel Different Over Time
Medically reviewed by
4 independent reviewers
Andrew Conrad Barile, PT, DPT
Doctor of Physical Therapy (DPT) | Licensed Physical Therapist (PT) | CEO and Founder, Xtreem Pulse LLC
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Dr. Andrew Conrad Barile is a Doctor of Physical Therapy and the CEO and Founder of Xtreem Pulse LLC, the engineering company behind PureLift. He earned his Doctorate in Physical Therapy from Daemen College and is a licensed physical therapist.
He brings over two decades of clinical and entrepreneurial experience across physical therapy, craniosacral therapy and medical device innovation, built on a working knowledge of human anatomy and muscle physiology.
For PureLift LAB he reviews how current is delivered across all ten levels, from sub-sensory nanocurrent and skin-level microcurrent to motor-level EMS, and how the Infuse pass fits into the same ten-minute routine.
Bertica M. Rubio, M.D.
Board-Certified Physician, Dartmouth Medical School | Medical Director, Antiaging Regenerative Medicine Clinic
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Dr. Bertica M. Rubio is a board-certified physician and Medical Director of the Antiaging Regenerative Medicine Clinic in Redlands, California. She earned her Doctor of Medicine from Dartmouth Medical School and completed her pediatrics residency at UC Irvine Medical Center.
With decades of clinical experience, she specialises in age management medicine, regenerative medicine, wound healing and growth factor therapies, and her practice integrates evidence-based medical science with advanced aesthetic treatment.
For PureLift LAB she reviews articles for medical accuracy across the whole dial, from the gentle nanocurrent and microcurrent settings through to muscle-level EMS and the Infuse pass.
Daniel Grinberg, MD, FACS
Board-Certified Otolaryngologist | Head and Neck Surgeon | Fellow, American College of Surgeons | Mount Sinai
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Daniel Grinberg, MD, FACS is a board-certified otolaryngologist and head and neck surgeon at ENT and Allergy Associates in West Nyack, New York. He earned his medical degree from Columbia University College of Physicians and Surgeons.
He completed his otolaryngology residency at New York University Medical Center, serves as Assistant Clinical Professor at Mount Sinai School of Medicine, and is a Fellow of both the American College of Surgeons and the American Academy of Otolaryngology.
For PureLift LAB he brings a wider clinical lens, connecting at-home facial stimulation from microcurrent to EMS to the anatomy underneath, with the same rigour we apply to every device specification.
Prof. Dr. med. Ivo Buschmann
Chair of Angiology, Medizinische Hochschule Brandenburg | Clinic Director, University Clinic for Angiology
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Prof. Dr. med. Ivo Buschmann is Chair of Angiology at the Medizinische Hochschule Brandenburg Theodor Fontane and Clinic Director of the University Clinic for Angiology at the Brandenburg University Hospital.
He trained at the University of Hamburg, was a Max Planck Society Fellow at the Max Planck Institute for Heart and Lung Research, and held senior consultant posts at the Charite Universitatsmedizin Berlin before his appointment as Chair in 2016.
One of Europe's leading authorities on arteriogenesis, with over 150 peer-reviewed publications and US and EU patents, he reviews for PureLift LAB how the evidence on electrical stimulation is read and where its limits lie.
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A facial device that felt strong in week one and feels like nothing by week six has almost certainly not broken.
This article explains what is actually happening, such as:
- Accommodation, the one people mean
- Dry serum, the one it usually is
- Dirty contacts
- Your tolerance rising
- Why sensation is a poor measure
and many more!
Each has a different fix, and climbing the dial is the wrong answer to three of the four.
Key Points:
Accommodation is a nerve responding less to a signal it has seen before, and it is normal rather than a fault.
Dry serum is the single most common cause; current needs a wet path and skin dries faster than people expect.
Residue on the contacts raises resistance, so cleaning the probe after every session is not optional.
Varied frequency delays accommodation, which is why PDM cycles 361 points between 1,370 and 1,730 Hz.
Sensation is not the measure of whether a session did anything.
Accommodation, the one people mean
Present a nerve with the same electrical signal repeatedly and it responds less. The stimulus has not changed; the nervous system has stopped treating it as news.
Downey and colleagues tested a modulation strategy against constant frequency in a neuromuscular stimulation protocol and found frequency variation extended a defined endpoint (PMID 21996798). Papaiordanidou and colleagues report a case where modulation did not help, and it is worth reading alongside rather than instead (10.1371/journal.pone.0084740).
PDM, Pulsed Dynamic Modulation, cycles through 361 frequency points between 1,370 and 1,730 Hz instead of holding one, which is the design response to this. It delays accommodation; it does not abolish it, and no honest description says otherwise.
Dry serum, the one it usually is
Current needs a conductive path, and that path is the wet layer between the probe and your skin. Skin dries faster than most people expect, particularly around the jaw and in a heated room, and a session that started well and faded halfway through is almost always this.
Reapply mid-session rather than pushing the level up. The dial compensates for a dry patch by delivering more current to the areas that are still wet, which is the opposite of what you want.
Any water-based serum works. Thick creams and oils are the wrong texture; they sit on the surface and block rather than carry.
Dirty contacts
Serum residue and skin oils build up on the probe and raise the resistance the current has to cross. The effect is gradual, which is exactly why it gets blamed on the device rather than on the fortnight of not wiping it down.
Clean the probe after every session with a damp cloth and dry it. A probe that looks clean in the bathroom light often is not.
Check the charge too; some devices reduce output as the battery falls rather than cutting out, so a fading sensation late in the week can be a flat battery.
Your tolerance rising
Week one, level 4 is startling. Week six, level 4 is ordinary, because you now know what it feels like and you are no longer bracing.
That is a change in you rather than in the current, and it is the one case where moving up the dial is reasonable. Move one level, not three, and only if the lower level genuinely feels like nothing rather than merely feeling familiar.
Why sensation is a poor measure
Maffiuletti's work makes the point that a dial setting is not the same as the tension actually produced in the muscle (PMID 29233625), and the same gap applies to what you feel.
With EMS you have a better check than sensation: look in the mirror. If the muscle is visibly contracting, motor-level current is being delivered, whatever the session feels like subjectively.
In the low bands, nanocurrent and microcurrent at levels 1 and 2, you are supposed to feel almost nothing, so a faint session there is the design working rather than failing.
The order to check things
Reapply serum first, because it is free and it is usually the answer.
Clean the probe second and charge the device.
Look in the mirror third, for visible contraction at EMS levels.
Move one level up last, and only after the first three came back clean.
Three minutes per side is the maximum on any PureLift model, and the ten minute session ends on its own; running longer is not a fix for a session that feels weak.
For the full breakdown of which technology sits where on the dial, see how the nine PureLift technologies work.