Safety & Precautions

Your Guide to a Safe and Positive Experience

At Halo, your wellbeing is our highest priority. The Halo headset is a safe and effective brain stimulation device designed to support your mood, sleep, and focus. Here’s what you need to know about its safety profile and how to use it responsibly.

Is Halo safe?

Yes, Halo uses transcranial direct current stimulation (tDCS), a well-researched method with a strong safety record. It delivers a gentle electrical current (2mA) to the left dorsolateral prefrontal cortex (DLPFC), a key region of the brain involved in mood regulation.

Our commitment to safety is built on three key pillars:

  • Grounded in clinical research: tDCS has been used in clinical and academic settings for decades. Hundreds of clinical trials have confirmed its safety and effectiveness when used as directed.
  • Gentle and non-invasive: Halo works by gently stimulating your brain’s neural pathways from the outside of your head. Most users report only a mild tingling or warmth on their skin under the headset pads.
  • A trusted safety profile: The exact technology in Halo has been used by over 50,000 people. No serious side effects have been reported.

Important: For the best and safest results, always read and follow the instructions in the user manual before first using Halo.

Who can use Halo?

Halo is designed for healthy adults seeking to support general wellness. Consult a healthcare professional before use if any of the following apply:

  • You have skull abnormalities or metal implants near the brain (e.g., brain surgery clips, plates, screws), cochlear implants, or brain pacemakers such as those used for Parkinson’s disease.
  • You have active skin conditions or open wounds where the headset pads will be placed (e.g., psoriasis, dermatitis).
  • You are pregnant or may be pregnant.
  • You are experiencing thoughts of self harm or suicide. (If this is the case, seek urgent medical help immediately).

Understanding possible side effects

The tDCS technology used in Halo has an excellent safety record established over millions of sessions in thousands of users over many years. Side effects are uncommon, and when they do occur, are typically mild and temporary.

Common (usually mild and resolve quickly)

  • Tingling, itching, warmth, or mild stinging under the pads, usually at the start of stimulation.
  • Temporary skin redness at the pad sites, which typically fades within an hour.
  • Mild headache that usually resolves within a couple of hours

Less Common

  • Skin irritation (dry, itchy, or broken skin) at the pad sites. This can often be prevented by ensuring the pads are not dry or reused.
  • Lightheadedness or mild nausea during or just after a session.

Rare (stop your session)

  • Strong pain or burning sensation during stimulation.
  • Skin redness, marks, or irritation lasting longer than 24 hours, blistering, or open sores at the pad sites. Do not resume using Halo until your skin is fully healed.

Very Rare (stop and seek medical advice)

  • Tinnitus (ringing or buzzing in the ears).
  • Fainting, or confusion.
  • Hypomania.

Can Halo treat other conditions?

No, Halo is a general wellness device intended to support mood, sleep, and focus in healthy individuals. While tDCS is a technology being explored for various medical applications, Halo is not a medical device. It is not intended to diagnose, treat, prevent or cure any medical condition or disease.

More questions?