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Do I Have MCAS Quiz

Do I Have MCAS Quiz - Free Mast Cell Symptoms Test - FreudlyTake a free do i have mcas quiz to check your symptoms and screen for signs of mcas. Quick, not a diagnosis, consult a specialist. Start now.en
In about 10 minutes, the Do I Have MCAS Quiz guides you through 15 questions about recurring skin, digestive, breathing, circulation, and whole-body episodes. Your result can help you notice patterns, organize observations, and identify situations worth discussing with a qualified clinician.
Questions: 1510 minutes
Do I Have MCAS: situation and reply bubbles
July 22, 2026July 22, 2026Material has been updatedJuly 22, 2026Material has been published
6,285 views
540 completions
462 likes
Daniel HallPsychologist · Test reviewer
462 likes
Scale Explorer

How the Scales are Structured

Breathing and Circulation EpisodesBaCE
This scale summarizes how often you’ve had episodes involving breathing changes or circulation-related symptoms such as wheezing, dizziness, or a racing heartbeat.
example score9/15
9/15Follow-up signalexample score
0No items marked
1 – 2Limited signal
3 – 15Follow-up signal
A score of 9 falls in the Follow-up signal range, indicating multiple reported breathing and/or circulation-related episodes that may be worth discussing in a clinical context.
Digestive and Whole-Body EpisodesDaWBE
This scale summarizes how often you report digestive symptoms and broader whole-body episodes that may cluster with other MCAS-like reactions.
example score5/15
5/15Follow-up signalexample score
0No items marked
1 – 2Limited signal
3 – 15Follow-up signal
A score of 5 falls in the Follow-up signal range, suggesting recurring or disruptive digestive/whole-body episodes were endorsed, though this is not diagnostic and similar patterns can have many causes.
Skin and Mucosal EpisodesSaME
This scale summarizes the frequency and impact of self-reported skin and mucosal episodes such as flushing, hives, itching, or swelling.
example score8/15
8/15Follow-up signalexample score
0No items marked
1 – 2Limited signal
3 – 15Follow-up signal
A score of 8 falls in the Follow-up signal range, suggesting you endorsed multiple or more disruptive skin/mucosal episodes that may be useful to discuss in a clinical context, while not indicating a diagnosis.
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DATA-BASED USER COHORTS

Who Usually Takes This Test?

Unexplained multi-system flares
41%OF USERS
People with recurring episodes that affect several body areas at once—like flushing or hives plus stomach upset, dizziness, or breathing changes—who want a clearer symptom snapshot to discuss with a clinician.
Known allergy-like reactions
34%OF USERS
People who have frequent “allergic” symptoms without a clear trigger or with normal allergy testing and are wondering whether mast cells could be involved.
Chronic illness pattern seekers
25%OF USERS
People managing conditions like POTS, EDS, chronic migraines, or IBS-type issues who notice food, heat, stress, or medication triggers and want to organize patterns across systems.
BASED ON AGGREGATED, ANONYMIZED DATA FROM TENS OF THOUSANDS OF FREUDLY USERS.
Benchmarking

See How You Compare

Once you complete the test, your results are compared with real-world data from people in your country.
Below is a preview of how scores are typically distributed across each scale.
Shaded area — where most people score
Dot — the average
You — your score lands on each curve after the test— your score, after the test
Breathing and Circulation EpisodesBaCE
You?
Average4.1
Typical rangeTypical1.6 – 6.7
Possible0 – 15
Digestive and Whole-Body EpisodesDaWE
You?
Average9.9
Typical rangeTypical8 – 11.7
Possible0 – 15
Skin and Mucosal EpisodesSaME
You?
Average4.9
Typical rangeTypical2.5 – 7.2
Possible0 – 15
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SAMPLE QUESTIONS

Example Questions From the Test

    • I have not noticed this.
    • It has happened repeatedly or in a recognizable pattern.
    • I recall one isolated episode.
    • It has happened a few times, without a clear pattern.
    • They have occurred once.
    • They recur in a recognizable pattern or after suspected triggers.
    • I have not experienced this pattern.
    • They have happened a few times, without a consistent pattern.
    • I had localized itching or a small rash without raised welts.
    • I have not had an itchy or swollen reaction like this.
    • My lips, tongue, mouth, or throat became swollen.
    • I developed widespread raised welts or hives.
WHAT THE TEST MEASURES

Do I Have MCAS Quiz - Description and methodology of the test

People who struggle to reconstruct recurring, unexplained episodes may use the Do I Have MCAS Quiz to create a clearer symptom history for a healthcare conversation. This mast cell activation syndrome quiz prompts attention to timing, possible triggers, duration, and impact, so scattered memories can be recorded in a more consistent way before an appointment.

What This Assessment Explores

This questionnaire is for people examining recurring or episode-like symptoms, possible triggers, and multi-system patterns. Items ask about skin changes, breathing, digestion, fatigue, headache, circulation, fainting, and disruption to normal activities.

The result groups those observations into three dimensions:

  • Breathing and Circulation Episodes (0-15) show respiratory or circulatory signals: No items marked (0), Limited signal (1-2), or Follow-up signal (3-15).
  • Digestive and Whole-Body Episodes (0-15) show recurring digestive or broader clusters: No items marked (0), Limited signal (1-2), or Follow-up signal (3-15).
  • Skin and Mucosal Episodes (0-15) show recurring itching, hives, flushing, or swelling: No items marked (0), Limited signal (1-2), or Follow-up signal (3-15).

As an MCAS symptom quiz, this questionnaire can organize a history for clinical discussion. The bands are reflective, not validated diagnostic or severity cutoffs; a concerning experience matters even if the total is low.

Methodology and Scientific Basis

Each item offers several choices rather than yes/no. The options distinguish absent, isolated or uncertain, repeated, and severe experiences, so the respondent selects the closest description of past events. It reports scores; displayed bands summarize endorsed patterns, while a red-flag response overrides the total.

These are reflective summaries, not norms, diagnostic, severity, or emergency-triage cutoffs. For this MCAS quiz, read results alongside timing, triggers, duration, treatment history, and possible alternative explanations.

Its closest published subject match is Molderings et al. (2006), whose study examined gastrointestinal manifestations in systemic mast cell disease. This questionnaire is conceptually consistent with that work, not a reproduction or validated adaptation. Weiler et al. (2019) and Valent et al. (2012, 2019) supply the consensus and diagnostic framework for suspected mast-cell activation.

As an online self-report tool, it is vulnerable to recall, current context, and differing interpretations of symptom terms. A low score cannot exclude MCAS or another condition, and a high score cannot confirm it. Call emergency services for severe breathing trouble, throat tightness or swelling, blue or gray lips, fainting, collapse, or rapidly worsening symptoms.

Literature:
  • Molderings, G. J., U. Kolck, C. Scheurlen, M. Brüss, T. Frieling, M. Raithel, and J. Homann. "Systemic Mast Cell Disease with Gastrointestinal Symptoms-A Diagnostic Questionnaire." Dtsch Med Wochenschr 131, no. 38 (2006): 2095-2100; 10.1055/s-2006-951337
  • Weiler, Catherine R., K. Frank Austen, Cem Akin, et al. "AAAAI Mast Cell Disorders Committee Work Group Report: Mast Cell Activation Syndrome (MCAS) Diagnosis and Management." Journal of Allergy and Clinical Immunology 144, no. 4 (2019): 883-896; 10.1016/j.jaci.2019.08.023
  • Valent, Peter, Cem Akin, et al. "Definitions, Criteria and Global Classification of Mast Cell Disorders with Special Reference to Mast Cell Activation Syndromes: A Consensus Proposal." International Archives of Allergy and Immunology 157, no. 3 (2012): 215-225; 10.1159/000328760
  • Valent, Peter, Cem Akin, et al. "Proposed Diagnostic Algorithm for Patients with Suspected Mast Cell Activation Syndrome." Journal of Allergy and Clinical Immunology: In Practice 7, no. 4 (2019): 1125-1133.e1; 10.1016/j.jaip.2019.01.006
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