UAS7 calculator (7-day Urticaria Activity Score)
The UAS7 measures disease activity in chronic spontaneous urticaria. Enter wheal count and itch intensity for each of the last seven days (0–3 each).
⚠︎ Learning tool for medical education – not for use in patients or for treatment decisions.
Classification (original publication)
| Score | Classification (original publication) |
|---|---|
| 0 | Urticaria-free |
| 1–6 | Well controlled |
| 7–15 | Mild activity |
| 16–27 | Moderate activity |
| 28–42 | Severe activity |
How the UAS7 works
The patient rates the number of wheals and itch intensity once daily (over 24 hours). The daily scores (0–6) are summed over seven consecutive days (0–42). The international urticaria guideline recommends the UAS7 for activity and the Urticaria Control Test (UCT) for control.
FAQ
Which UAS7 indicates well-controlled urticaria?▾
A UAS7 of 1–6 is considered well controlled, 0 urticaria-free (Stull 2017).
References
- Stull D et al. Measurement properties of the Urticaria Activity Score and the Urticaria Control Test in patients with chronic spontaneous urticaria. Br J Dermatol 2017;177:1093–101. · PubMed
- Zuberbier T et al. The international EAACI/GA²LEN/EuroGuiDerm/APAAACI guideline for the definition, classification, diagnosis, and management of urticaria. Allergy 2022;77:734–66. · PubMed
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Open in browser Download on the App StoreIntended purpose: learning tool for medical education only. Not intended for use in patients or for diagnostic or treatment decisions; not a medical device. Calculations follow the cited original publications; no guarantee of completeness or correctness. Last updated: 09/2026 · Dr. Pascal Bafteh