Polymorphous light eruption is another type of a photosensitivity disorder that is somewhat similar to solar urticaria, where rashes appear on the skin after being exposed to the sun. The condition usually resolves by itself in a few days or weeks.

Risk Factors and Symptomatology

The cause of PMLE is still not fully known. The condition can occur in anybody. However, there is an increased risk in women between 20 to 40 years of age, those with a family history of PMLE, and those people from northern climates when exposed to the warm sun in spring or summer.

Typically, a reaction occurs as a result of UV-radiation. Hence, it is not only limited to sun exposure but may also happen when exposed to tanning beds and tanning lamps. Most experts acknowledge that UV-A light is the main causative factor. PMLE may manifest in a wide variety of forms (polymorphous) ranging from small bumps, papules, papulovesicles, blisters, and plaques that cause a burning sensation that may last for several days. Oftentimes, the symptoms will simply resolve without medications in a few days.

What Your Doctor Can Do for You

A diagnosis of polymorphous light eruption can be made by conducting a thorough physical examination of the skin, familial history of the disease, blood testing, and phototesting to rule out similar conditions like photoallergic reaction, systemic lupus erythematosus (Lupus), and solar urticaria. The condition could not entirely be treated; however, the symptoms may be managed by limiting exposure to sources UV rays. Often, the rashes are self-limiting. But many have benefited from the application of corticosteroid creams and phototherapy. In more severe cases, they may require to complete a course of immunosuppressant drugs.

What You Can Do

Susceptibility to the disease may be difficult to avoid, but an episode of PMLE can easily be controlled by wearing appropriate clothing to protect against UV rays of the sun especially during mid-day during summer. When going outdoors or even while staying indoors, apply sunscreen that has an SPF factor of 15 and above. And don’t forget to include your lips which are also vulnerable to the sun’s rays. You should also wear long pants, and a long-sleeved shirt to cover your skin. There is also some special clothing available that has been tested for its protective qualities.