Complex conditions
When many organs are involved.
Symptoms in several organs, many specialists, and each of them has examined only their own part? That is precisely the problem with these conditions: mast cells, the nervous system, connective tissue and blood vessels do not respect the boundaries between specialties.
It is exactly these connections that interest me. At the practice, I focus above all on mast cell diagnostics and on everything concerning the stomach and bowel. And I will tell you who else belongs on your team.
Why patients come to me
These conditions are often connected
Mast cell activation, disorders of circulatory regulation and hypermobility occur together remarkably often, and they not infrequently worsen after an infection. Treating only one part leaves one wondering why nothing improves.
Mast cell activation syndrome (MCAS)
Flushing, itching, a racing heart, diarrhoea, headache, brain fog – recurring in several organs? Mast cells contain some 200 messenger substances, and the symptoms are correspondingly varied. Many people wait years for an explanation.
Histamine intolerance
Reactions to red wine, mature cheese or tomatoes? Whether the cause lies in the breakdown of histamine or in the mast cells makes a considerable difference to treatment. And a strict diet is rarely the whole answer.
Mast cells in the gut
If the symptoms mainly affect the bowel, I have tissue samples taken during gastroscopy or colonoscopy specifically stained and counted for mast cells. This makes it possible to demonstrate mast cell-associated inflammation that cannot be seen with the naked eye.
POTS and dysautonomia
A racing heart on standing up, dizziness, exhaustion? The autonomic nervous system also controls the stomach and bowel. Delayed gastric emptying, nausea and constipation are therefore often part of the picture and are easily overlooked.
Hypermobility and hEDS
Hypermobile joints are surprisingly often accompanied by gastrointestinal complaints, circulatory problems and mast cell activation. I am a member of the medical advisory board of EDS Community Austria.
Long Covid and ME/CFS
I have worked intensively on these conditions since the pandemic, including in research. For comprehensive care, I founded the Long Covid Online Clinic; at the practice, I take on gastrointestinal and mast cell diagnostics.
Specialised mast cell diagnostics
A normal value is not yet an all-clear
A diagnosis of MCAS requires three things: typical, recurring symptoms in at least two organ systems, laboratory evidence of mast cell activity, and a response to mast cell-directed therapy.
In laboratory testing, timing is decisive. Tryptase varies considerably from person to person; what is meaningful is therefore the rise above your own baseline value. Depending on the question, further messenger substances in blood and urine are added.
And when the bowel is the main concern, tissue samples are part of the work-up. I take these myself during the endoscopy, which spares you a second examination. If tissue samples were taken earlier, I can also have these re-stained for mast cells.
Long Covid and ME/CFS
With Long Covid and ME/CFS, every unnecessary journey is one too many. That is why, in 2025, I founded the first Long Covid Online Clinic: specialised care without travel and with a standardised work-up.
At the practice, I take on what must be done in person: gastrointestinal assessment, ultrasound, endoscopy and mast cell diagnostics.
In ME/CFS, I also measure grip strength with a hand dynamometer, following the Charité Berlin protocol: first a series of repeated measurements, then a second round one hour later. This shows how much strength declines under repeated effort and how well it recovers afterwards, making fatigability and delayed recovery objectively measurable. The measurement is included in the appointment.
Professional network
Medical advisory boards
WE&ME Foundation, EDS Community Austria and the international medical advisory board of AESCOV.
Research and teaching
Co-author of an international textbook on ME/CFS published by Elsevier, teaching at the Medical University of Vienna and, from November 2026, in the university course on post-viral syndromes at the Medical University of Graz.
Further reading
In the blog (in German), I explain mast cell activation, histamine intolerance and Long Covid in more detail.
Procedure and costs
Well prepared for the first consultation
Please bring your previous findings and a current list of your medication. At the first appointment, we put everything in order, examine you and determine which diagnostic steps will genuinely move things forward.
Comprehensive consultation with review of your previous findings and physical examination, 50 minutes. Ultrasound or ECG included if needed.
If the blood is drawn outside an appointment. Within an appointment it is included.
Tryptase, histamine, leukotrienes and further markers depending on the question. The laboratory bills you directly for the analysis.
Where clinically indicated, routine laboratory tests are usually covered by your statutory health insurer. The laboratory bills specialised mast cell diagnostics directly to you. Follow-up appointments are charged according to duration; all prices under Services.
Frequently asked questions
What patients ask me beforehand
I already have many findings. Should I bring them all?
Yes, please do. Particularly with complex conditions, every previous finding helps, even if it was "unremarkable". Ideally sorted chronologically, together with a current list of your medication.
Do you also treat Long Covid and ME/CFS at the practice?
For Long Covid and ME/CFS, the Long Covid Online Clinic, which I founded, offers a dedicated, specialised service without the need to travel. This is particularly valuable in the case of exertion intolerance. At the practice, I mainly take on the gastrointestinal aspects and mast cell diagnostics.
My tryptase level was normal. Can I still have MCAS?
Yes. A normal tryptase level does not rule out MCAS, because the baseline value varies considerably from person to person. What is meaningful is the comparison: one value on a good day and a second shortly after a flare of symptoms. We will discuss in advance how best to arrange this.
Do I need to stop any medication before the diagnostic tests?
Please do not stop anything on your own initiative. We will discuss together what is advisable before which test.
Do you work with other specialists?
Yes, and with these conditions it is essential – for example with cardiology, neurology, allergology, rheumatology or gynaecology. I will tell you whom you need for what.
Appointments
Make an appointment
Briefly let us know what it concerns, and bring your previous findings with you. Or book directly online.
Already a patient? Requests, questions about results and prescription renewals are best sent via Mein Arzt Online (opens in new window). Opening hours and directions