The stomach reacts to your day.
Bloating, heaviness, constipation and diarrhoea by turns. The gastroscopy is clean, the tests are fine — and still, every tense day makes itself felt in the gut.
What it looks like day to day.
If you recognise three or more, it is worth looking not at each complaint separately, but at the system that connects them.
- 01Bloating and heaviness without a clear cause
- 02Constipation and diarrhoea by turns
- 03The complaints intensify in tense periods
- 04The tests show no finding
- 05Foods that were tolerated before now irritate
The complaint is on the surface. The control sits deeper.
The gut has its own nervous system — around five hundred million neurons — and it is in constant conversation with the brain through the vagus nerve. Motility, blood supply and secretion are governed autonomically.
When the body is in alarm, digestion is not a priority: blood goes elsewhere, motility changes. That is why a finding is often absent in functional complaints — not because there is no problem, but because the problem lies in the regulation, not in the structure.
NESA works on the gut–brain axis from the regulation side. It does not affect the microbiome and does not replace diet or gastroenterological treatment.
We force nothing. We speak the language the body already uses.
NESA XSIGNAL® is a certified medical device for non-invasive neuromodulation of the autonomic nervous system.
Your body runs on electricity
The autonomic nervous system — the one that governs sleep, alertness, bladder and digestion — works at very low frequencies: between 1 and 14 cycles per second.
NESA speaks in the same window
Microcurrents in that same frequency range, delivered through gloves and ankle cuffs while you lie down or sit in a chair. No needles, no medication, no preparation.
The fact that you cannot feel it is why it works
The signal sits below the threshold of sensation. Because it does not trigger the body’s defences, the nervous system does not habituate to it, and the signal can accompany it session after session.
The practitioner’s hands stay free
The session runs alongside another therapy — physiotherapy, conversation, rehabilitation. Not a separate appointment, but a layer over the treatment already under way.
Manufacturer data, NESA (NGS Health and Mind S.L.), post-market surveillance system, as of July 2026. The zero refers to reported serious adverse events, not to the absence of any reaction whatsoever.
When would I notice anything?
It depends on one thing: how long the regulation has been disturbed. We say so up front, so you know what to expect — and so you do not stop after the third session because nothing has happened yet.
The first changes are usually felt here — most often in sleep and in recovery.
The more substantial change comes in this range, at a steady rhythm of two sessions a week.
With a chronic profile the work is done in blocks. After each block, a fresh assessment with objective measures, not by feel alone.
A guiding framework from practice, not a promise of results. The exact schedule is set by the practitioner delivering the treatment.
The figures come from the manufacturer — with the source.
NESA is used in clinics and hospitals across 53 countries and is the subject of more than 20 peer-reviewed publications. The manufacturer publishes the results together with the journal and PMID of each study — so anyone can check the source themselves instead of relying on a retelling.
Where this leads.
A complaint rarely belongs to one specialty alone. This is where one usually starts with it — and what each page covers.
Short answers, no hedging.
Does it replace the diet?
No. Diet and gastroenterological treatment remain. NESA works on the regulation beneath them.
Is a gastroscopy needed first?
Organic causes are excluded first, by a gastroenterologist. That is not the centre’s decision and not the device’s.
Does it affect the microbiome?
There are no such data and we do not claim it. The work is on the nervous regulation of digestion.
How often?
The usual schedule is two sessions a week. The exact plan is set by the practitioner after the first assessment.
It rarely comes alone.
Complaints of the autonomic nervous system rarely arrive on their own. If you recognise another one here, that is most likely not a coincidence.
Where can I get a NESA session?
The authorised centres in Bulgaria — Sofia, Plovdiv and Pleven — with address, phone and contact person.
NESA information pack
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