Also, there have been a few unorthodox (unusual) causes of solar urticaria.

Another test known as a phototest is the most useful in identifying solar urticaria.

Solar urticaria is classified into six different types, depending upon the wavelength of light involved.

Sun poisoning can also refer to polymorphous light eruption or solar urticaria.

The occurrence of drug-induced solar urticaria may be associated with porphyrias.

Two examples are polymorphous light eruption and solar urticaria.

Solar urticaria accounts for less than one percent of the many documented urticaria cases.

In 1942 the disease was passively transferred to normal volunteers using serum from patients with solar urticaria.

Solar urticaria, due to its particular features, is considered to be a type of physical urticaria or light sensitivity.

In the case of solar urticaria, phototherapy and photochemotherapy are the two major desensitization treatments.

Solar urticaria is an allergy to sunlight."

In rare cases individuals with solar urticaria (allergy to sunlight) can get a rash from fluorescent lighting.

In the United States, only about 4% of patients with photosensitive disorders are reported to have been diagnosed with solar urticaria.

Solar urticaria can be difficult to diagnose, but its presence can be confirmed by the process of phototesting.

This indicates that the reaction is only a characteristic of the patients with solar urticaria and that it is not phototoxic.

Fixed solar urticaria is induced by a broad spectrum of radiative energy with wavelengths ranging from 300-700 nm.

Doctors will sometimes prescribe immunosuppressive drugs such as prednisolone and ciclosporin if the patient is suffering from an intense form of solar urticaria.

Also, a reaction with PMLE will take a greater amount of time to appear than with solar urticaria.

When the UV radiation or light comes in contact with a person with solar urticaria, histamine is released from mast cells.

A subgroup of solar urticaria, fixed solar urticaria, has also been identified.

Fatigue Chills Headache Nausea Solar urticaria.

Phase II trials assessing afamelanotide as a preventative treatment in patients suffering solar urticaria commenced in September 2008.

Physical urticaria arises from physical factors in the environment, which in the case of solar urticaria is UV radiation or light.

Solar urticaria is an immunoglobulin E-mediated hypersensitivity that can be introduced through primary or secondary factors, or induced by exogenous photosensitization.

Type I solar urticaria is caused by UVB (ultraviolet B) radiation, with wavelengths ranging from 290-320 nm.