CES: Can a Gentle Electrical Current Calm Anxiety?

• What is CES and how does it work for anxiety?
• Can cranial electrotherapy stimulation really help with anxiety?

By Dr. Douglas Cowan, Psy.D., MFT

The first time most people hear about Cranial Electrotherapy Stimulation, their reaction is some version of skepticism. A gentle electrical current? Through ear clips? For anxiety?

I understand that reaction. It sounds like a relic from a time when medicine involved things we now consider bizarre. But CES is not that. It has been in clinical use for over sixty years, has FDA clearance in the United States, has been adopted by the Department of Defense for treating combat-related anxiety and PTSD, and has a growing body of published research behind it. The skepticism is reasonable — but the evidence asks us to take it seriously.

Let me explain, in plain language, how it works and why it helps.

What’s Happening in the Brain

The anxious brain is not a broken brain. It is a brain that has gotten stuck in a particular pattern — high-frequency, high-arousal electrical activity that keeps the nervous system in a state of constant alert.

Here is how that pattern develops. The brain generates electrical oscillations at different frequencies. When you are calm and awake, your brain produces predominantly alpha waves — a relaxed, open, steady rhythm. When you’re focused on a task, beta waves predominate. When the anxiety system is overactivated, high-beta and gamma frequencies dominate — the brain equivalent of a car engine running at high RPM when the car is parked. It burns energy, creates heat, wears things down, and doesn’t go anywhere useful.

Simultaneously, the neurochemical system that is supposed to brake this pattern — primarily GABA, the brain’s primary inhibitory neurotransmitter — becomes less effective. The alarm keeps sounding. The off switch doesn’t work properly.

This is where CES enters. Cranial Electrotherapy Stimulation delivers a very small alternating electrical current — measured in microamperes, which is a millionth of an ampere — through electrodes placed on the earlobes or scalp. This current is far below the threshold of painful sensation. Most users feel nothing, or a very mild tingling. Some feel gently relaxed or slightly sleepy during the session.

What the current appears to do, based on both EEG research and neurochemical studies, is interrupt the stuck high-frequency pattern and nudge the brain toward calmer alpha-wave activity. At the same time, it appears to increase the production and activity of GABA, serotonin, and beta-endorphins — the brain’s own calming and mood-regulating chemistry. The autonomic nervous system shifts toward parasympathetic dominance: the rest-and-digest state that is the opposite of the fight-or-flight alarm.

In plain terms: the brain gets a gentle signal to stand down. And for most people, it listens.

Now You Understand Why

The reason this sounds strange is that we’re used to thinking about anxiety as a thinking problem — something we address by changing thoughts, interpreting situations differently, learning to reframe catastrophic predictions.

Cognitive approaches to anxiety are real and valuable. But for many people, especially those with chronic anxiety, the anxiety isn’t primarily being driven by how they’re thinking about things. It’s being driven by a nervous system that is running hot independently of what the person is thinking at any given moment. You can think very clearly and rationally and still feel terrified. You can understand perfectly well that you’re not in danger and still feel like you are.

That is not a failure of thinking. That is a regulation problem — a nervous system that has lost its calibration.

Medication addresses part of this: SSRIs gradually change the neurochemical environment over weeks. Benzodiazepines rapidly suppress the system — but carry dependency risk and cognitive costs that limit their long-term usefulness.

CES offers something different: a non-pharmacological way to shift the brain’s electrical state and neurochemical balance without the side effect profile of medication, without dependency risk, and with effects that appear to be cumulative — building a new, calmer baseline across repeated sessions.

This is not a miracle, and I want to be clear about that. CES doesn’t work the same way for every person, just as no anxiety intervention does. But for a very large percentage of people — and the research and my clinical experience put this at roughly 80 percent — it produces meaningful anxiety reduction. Those are numbers worth taking seriously.

What the Research Shows

CES has been studied since the 1960s. The evidence base now includes over 250 published research articles, and the picture they collectively paint is consistent: CES reduces anxiety in the majority of people who use it, and the effects are not simply a relaxation response during the session — they persist after treatment ends.

The FDA cleared CES specifically for anxiety, insomnia, and depression — the three conditions that have the strongest evidence behind them. FDA clearance is different from FDA approval (which drugs receive), but it does represent a regulatory determination that the device is safe and effective based on the available evidence.

The Department of Defense and Veterans Affairs use CES in military treatment facilities, including for service members and veterans with anxiety and PTSD. Clinical adoption at that scale represents a kind of real-world endorsement that goes beyond controlled trials.

A 2024 independent evidence review examining over 630 patients found CES effective for anxiety reduction with effects lasting at least one month after treatment ended. A 2025 real-world evaluation of at-home CES use found consistent improvements across anxiety, sleep, and mood in users over an extended period.

What Wisdom Looks Like Here

The practical question is not “does this work?” — the evidence supports that it does for most people. The practical question is “does it fit your situation?”

CES is most likely to be a good fit when:

You’re looking for a non-pharmacological primary approach or a supplement to existing treatment. You have anxiety that has a strong physiological component — that persistent background hum that doesn’t quiet down even when you’re not actively worrying about anything. You want something you can use at home, daily, without needing a clinical appointment each time. Your anxiety has been resistant to other approaches.

CES is not a good fit for people with pacemakers or other implanted electrical devices, and should be discussed with a physician during pregnancy. A conversation with a qualified clinician before starting is wise regardless of your situation.

One practical note on timing: CES effects build across sessions. Daily use over three to four weeks gives you enough exposure to see whether it’s working for you. Stopping after two or three sessions and concluding it doesn’t work is like stopping a new medication after three days.

What To Do Starting Today

• Learn enough to have an informed conversation with a clinician. The article you’re reading now is a starting point. Ask your therapist, psychiatrist, or primary care provider specifically about CES and whether it would be appropriate for your presentation. Many clinicians are not familiar with it — be willing to bring the question to them rather than waiting for them to introduce it.

• Understand what you’re treating. Anxiety is not one thing. Generalized anxiety disorder, panic disorder, social anxiety, anxiety that travels alongside PTSD or ADHD each have somewhat different profiles. CES appears to be broadly useful across these presentations, but understanding your specific pattern helps you set appropriate expectations.

• If you begin a CES trial, track your results. Score your anxiety on a simple 0 to 10 scale at the same time every day. Sleep quality is worth tracking too, since CES often improves sleep alongside anxiety. After three to four weeks of daily use, you’ll have objective data rather than impressions.

• Combine it with other approaches. The people who get the most from CES typically also do the behavioral and cognitive work — building skills that the calmer nervous system is better able to use. CES creates better conditions for other approaches to work. It is not a standalone solution so much as a physiological foundation.

Is the idea strange? A little. Sixty years ago, so was the idea of a low-dose electrical signal treating depression — and ECT is now widely accepted in psychiatry, though it works through very different mechanisms. New tools that work through electrical means on the nervous system are becoming a legitimate and growing part of mental health care. CES is one of the most accessible, lowest-risk entries into that category.

The anxious brain wants to settle. Give it the right conditions, and most of the time, it will.

References

1. ECRI Institute. (2024). Evidence review: Cranial electrotherapy stimulation for anxiety, depression, and insomnia. ECRI Health Technology Assessment.
2. Haberland, B., et al. (2025). Real-world evaluation of at-home CES for anxiety, depression, and sleep. ScienceDirect.
3. Kirsch, D. L., & Nichols, F. (2013). Cranial electrotherapy stimulation for treatment of anxiety, depression, and insomnia. Psychiatric Clinics of North America, 36(1), 169–176.
4. Barclay, T. H., & Barclay, R. D. (2014). A clinical trial of cranial electrotherapy stimulation for anxiety and comorbid depression. Journal of Affective Disorders, 164, 171–177.
5. Kavirajan, H. C., et al. (2014). Alternating current cranial electrotherapy stimulation (CES) use in clinical practice. Journal of Psychiatric Research, 55, 1–12.
6. Holubec, J. T. (2010). Survey of members of the U.S. military: CES and PTSD symptom improvement. Military Medicine, 175(4), 279–284.