Solar urticaria: causes, symptoms, treatment

August 15, 2017 23:00 | Allergies

Summer and spring time are the most favorite times of the year for most people.However, for 3% of people this period carries more negative emotions.Despite the fact that solar urticaria( otherwise - an allergy to the sun's rays) is a rare disease, yet this does not detract from the danger that ultraviolet carries for such special patients.What are the features of photodermatosis?

Let's talk today about the symptoms, causes and treatment of solar urticaria by traditional and folk remedies, consider photos of patients and study the prognosis with it.

Features of the disease

Solar urticaria is also called pseudoallergia, because despite the abundance of symptoms associated with an allergic reaction, no antibodies are produced in the blood of patients of any age. If photodermatitis is hereditary, it will manifest itself in childhood.

In other cases, all people are equally exposed to it, since it is not known what exactly triggers the disease, although the female is diagnosed more often.Most susceptibl

e to her patients, whose skin quickly burns or does not lend itself to sunburn.

The concept and symptoms of solar urticaria are discussed in this video:

Classification of solar urticaria

Adverse hysterectomy of the acute and chronic form is revealed.The latter is divided into persistent papular and recurrent.

Among all types of hives, the sun is classified as a physical type, i.e., to a disease that is preceded by an effect on the body from the outside.

Causes of

Urticaria-sunny-1 The mechanism of the occurrence of solar urticaria has not been studied to the end, however doctors assume that there are several factors that trigger the pathological process:

  1. Hypersensitivity.Photodermatosis provokes the ultraviolet radiated by the heavenly body.Negatively it acts on basophils - blood components.And since they are located in the upper part of the skin, there are symptoms that are similar in appearance to manifestations of dermatosis.
  2. The opposite opinion of scientists is based on the assumption that solar urticaria does not appear as an allergic reaction, but as a reaction of the body to excessive production of protoporphyrins.These elements are sensitive to rays, so sensitization takes place.This phenomenon is considered a pathology, inherited.
  3. A photosensitizer may act as a provocateur of the disease, that is, any cosmetics if they contain a substance capable of provoking such a reaction.Hives occur as a result of the development of toxic components, if a person has pathologies of the thyroid gland, kidneys.
  4. Psychoemotional factor.

Most physicians are inclined to precisely determine what actually causes an allergy to the sun.


If a person prone to photodermatitis will stay in the sun for a certain amount of time( from 10 to 90 minutes), then it threatens with a number of unpleasant symptoms:

  • extensive scatter of red spots;
  • unbearable itching;
  • blisters;
  • chills;
  • nausea;
  • weakness.

In this case:

  • Severity of symptoms depends on how long the sun shone on the skin.If from 2 hours or more, it is very likely the appearance of nausea, vomiting and even fainting, and blisters will be more.
  • With short( up to 30 minutes) exposure, the symptoms go off quickly, the rash has a small size and the itching is not as pronounced.

You can try to determine what caused the photodermatitis.For example, if cosmetic means have their influence, then the areas of reddening have clear boundaries.If the factor is internal disease or uncontrolled drug intake, then the circles of redness are symmetrical.

Not always the signs of solar urticaria appear immediately after contact with the sun.It also happens that the first symptoms occur only after 1-2 days.They pass in different ways for each person.It is enough for someone to go into the shade and wait a while for the manifestations of photodermatosis to disappear, and someone needs a full treatment.


It is easy to determine the nature of the disease.In differential diagnosis, attention is drawn to the characteristic location and mechanism of the rash.

In addition, a study is conducted to determine the amount of protoporphyrin in erythrocytes.This is necessary to exclude the inherently transmitted erythropoietic protoporphyria.