---
title: "What does a high Tryptase mean?"
type: biomarker-interpretation
url: "https://www.test-well.com/biomarkers/tryptase/high"
biomarker: Tryptase
direction: high
reference_range:
  - "age 18+: 0.000 – 11.5 ng/mL"
reviewed_at: 2026-09-08
review_status: reviewed
date_published: 2026-09-05
---

# What does a high Tryptase mean?

> Tryptase is released by mast cells. A level drawn within a few hours of a severe allergic reaction that is well above the person's baseline confirms anaphylaxis; a persistently high baseline (above ~11.5, and especially above 20 ng/mL) raises the question of systemic mastocytosis or hereditary alpha-tryptasemia, an inherited trait carried by roughly 5% of people. Kidney disease and some blood disorders raise it modestly.


## When does this result need same-day care?

- Any episode with throat tightness, breathing difficulty or fainting — emergency care; the tryptase can be drawn afterwards

## What is the normal range for Tryptase?

- age 18+: 0.000 – 11.5 ng/mL

Often reflects an active or recent allergic reaction (anaphylaxis), or mast cell disorders.

## What are the common causes of high Tryptase?

1. Anaphylaxis or severe allergic reaction (transient, peaks 1–2 hours)
2. Hereditary alpha-tryptasemia (inherited extra copies of the tryptase gene)
3. Systemic mastocytosis, mast cell activation syndrome
4. Chronic kidney disease, myeloid blood disorders
5. Some parasitic infections

## What symptoms go with high Tryptase?

- Flushing, hives, itching, abdominal cramps, diarrhea, lightheadedness with episodes
- Bone pain, unexplained anaphylaxis, or none

## What do clinicians usually check next?

- Repeat at baseline (no symptoms for 24 hours) to distinguish an acute spike from a persistently high level
- Allergy/immunology referral if baseline is above ~11.5 ng/mL
- TPSAB1 gene copy testing for hereditary alpha-tryptasemia; bone-marrow evaluation only when mastocytosis is suspected

## How do you recheck Tryptase?

| Test or panel | Type | Price | Fasting | Results |
| --- | --- | --- | --- | --- |
| [Tryptase](https://www.test-well.com/tests/tryptase-test) | Test | $71.99 | No | 3–5 business days |

Plus one $6 lab processing fee per order; physician authorization included.

## Common questions

### My tryptase is 14 but I feel fine. What now?

A mildly high baseline is most often hereditary alpha-tryptasemia, which is common and usually benign. An allergist can confirm with a gene-copy test and explain what it means for anaphylaxis risk.

## Related

- [Tryptase reference ranges](https://www.test-well.com/biomarkers/tryptase)
- [hs-CRP reference range](https://www.test-well.com/biomarkers/hs-crp)
- [ESR reference range](https://www.test-well.com/biomarkers/esr)
- [C-Reactive Protein reference range](https://www.test-well.com/biomarkers/c-reactive-protein)

## Sources

- [Mayo Clinic Labs](https://www.mayocliniclabs.com/test-catalog/overview/82951)
- [Testing.com (AACC) — Tryptase Lab Test: Order a Blood Test for Allergic Reactions](https://www.testing.com/tests/tryptase/)

---

Medically reviewed by Youmna DiStefano, MD (Medical Reviewer, TestWell); last reviewed 2026-09-08. Review policy: https://www.test-well.com/editorial-policy

Canonical page: https://www.test-well.com/biomarkers/tryptase/high
Machine-readable catalog: https://www.test-well.com/api/catalog.json · MCP server: https://www.test-well.com/mcp · Overview for agents: https://www.test-well.com/llms.txt

Prices are cash-pay, in USD, and include physician authorization; every order adds one flat $6 lab processing fee. Educational content is not a diagnosis — discuss results with a clinician.