Device to determine cold contact urticaria and the individual threshold temperature for the patient

TempTest® produces temperatures of 4°- 44° C. which are applied to the skin. The patient places the inner forearm on an aluminum stencil on the device for 5 minutes. The stencil shows the temperature range continuously. With this procedure it is determined at which threshold temperature (highest temperature for cold- and lowest temperature for heat urticaria) wheals are triggered.



The device determines if a patient suffers from cold contact urticaria (CCU) and at what threshold temperature the symptoms occur. Cold contact urticaria is a form of physical urticaria, in which with contact of the skin with temperatures below skin temperature, symptoms like itching, burning wheals and/or angioedema will occur. The device can also detect heat contact urticaria (reaction to contact with temperatures above skin temperature). Cold contact urticaria however is the more frequent type.


Quick Fact TempTest®
    • The TempTest® is extremely easy and quick to handle.
    • Only by permanently checking the threshold temperature, the success of a therapy becomes measurable.
    • The comfortable measurement at the inner forearm helps the patient to understand the diagnosis and the treatment success.
    • The device can be used on adult and pediatric patients.
    • Once the patient knows the individual threshold temperature for the CCU, symptoms can be avoided as far as possible: e.g. by avoiding special food, drinks or specific sports, by wearing protective clothes whenever it is below the threshold temperature, by using skin protection products and many more precautions.
    • Other doctors can be informed of the critical temperature before any possible treatment to minimize risks.
    • Unwanted side effects are very uncommon. If the test is positive and wheals form, they may last some minutes up to hours, including in some cases itching and/or burning. However, they regress after several hours without lasting consequences.