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.
The most commonly reported side effects are:
- Skin reactions (pain, redness, irritation, minor burns)
- Headache
- Tinnitus
- Worsened symptoms of depression including increased anxiety
- Tiredness, fatigue and sleep disturbances
It’s important to closely monitor any side effects. They usually get better or go away as your body gets used to the treatment. If you have any concerns or notice anything unusual, contact our support team for help.
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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.
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