Every year, many people suffer fromsun allergy, also known as photosensitivity. Contrary to what you might think, it’s not just sunburn. Sun allergy is a reaction of the immune system to UV rays. In this article, we take a look at the causes, symptoms and possible treatments for this allergy.
What is sun allergy?
Sun allergy, or photosensitivity, is an immune system reaction that occurs when the skin is exposed to sunlight. This reaction is triggered by the release of histamine in the skin, causing redness, itching and sometimes even blistering. Sun allergy sufferers may also experience more severe symptoms, such as breathing difficulties, nausea, vomiting and facial swelling.
What causes sun allergy?
The exact causes of sun allergy remain poorly understood. However, several factors can increase the risk of developing this allergy:
- Genetic predisposition: some people have a natural predisposition to developing allergies, including sun allergy.
- The use of photosensitizing drugs: some drugs can make the skin more sensitive to UV rays, provoking an allergic reaction. These include antibiotics, non-steroidal anti-inflammatory drugs and certain antidepressants.
- Exposure to chemicals: certain chemical substances found in cosmetics, perfumes and cleaning products can also increase the risk of sun allergy.
How to recognize the symptoms of sun allergy?
Symptoms of sun allergy can vary depending on the severity of the reaction and the sensitivity of the person concerned. Here are the main symptoms:
- Redness and itching: these are the most common symptoms of sun allergy. They generally appear within a few hours of exposure to the sun, and can last for several days.
- Blisters and pimples: in some people, sun allergy can lead to the appearance of blisters and pimples on the skin, similar to those seen in sunburn.
- Desquamation and dry skin: the skin may also start to peel and show areas of dryness.
- General symptoms: in the most severe cases, sun allergy can be accompanied by general symptoms such as fever, headaches, nausea and vomiting.
How to prevent and treat sun allergy?
There are several measures you can take to prevent the onset of sun allergy:
- Avoid prolonged exposure to the sun: we recommend limiting the amount of time you spend in the sun, particularly at times when UV rays are most intense (between 12pm and 4pm).
- Wear protective clothing: opt for long-sleeved shirts, pants and hats to protect your skin from the sun.
- Use a suitable sunscreen: choose a broad-spectrum sunscreen with a protection factor of at least 30. Apply generously to all exposed parts of your skin, and reapply every two hours.
- Check medications and cosmetics: consult your doctor or pharmacist before taking any medication that may cause photosensitivity, and check that your cosmetics do not contain any chemical substances that may increase the risk of sun allergy.
In the event of an allergic reaction to the sun, several treatments can be considered:
- Soothing and anti-inflammatory creams: corticosteroid-based creams or antihistamines can be prescribed by a doctor to relieve itching and reduce skin inflammation.
- Cold compresses: applying a cold compress to the affected areas can also help relieve sun allergy symptoms.
- Antihistamines: in some cases, a doctor may prescribe oral antihistamines to reduce the immune system’s reaction and limit the symptoms of sun allergy.
- Skin hydration: it’s important to regularly moisturize the skin with appropriate creams or lotions to avoid skin dryness. Be sure to choose products without perfumes or preservatives that can aggravate allergic reactions.
When should you see a doctor?
We recommend consulting a doctor if sun allergy symptoms are particularly intense, last longer than a week or are accompanied by fever, nausea and vomiting. The doctor can assess the severity of the reaction and prescribe appropriate treatment.
In short, sun allergy is a relatively common condition that can be prevented and treated with simple, effective measures. It’s essential to protect your skin from the sun to avoid complications linked to this allergy.
