What is a polymorphic rash on light?
Polymorphous light eruption, also known as polymorphic light eruption, is a rash caused by sun exposure in people who have developed sensitivity to sunlight.
The rash usually appears as red, tiny bumps or slightly raised patches of skin.
Polymorphous light eruption occurs most often during spring and early summer when a person's exposure to sunlight increases. Repeat episodes are less likely as the summer progresses. But the rash often recurs each year after the first incident.
Polymorphous light eruption usually goes away on its own without scarring within 10 days. People with severe or persistent rashes may need treatment with medication.
Symptoms
The term "eruption" refers to the rash, which usually appears 30 minutes to several hours after exposure to sunlight.
The rash typically appears on areas of the body that tend to be covered during winter but exposed in summer: the upper chest, front of the neck and arms.
Characteristics of the rash may include:
- Dense clusters of small bumps and blisters
- Red, raised rough patches
- Itching
- Burning
Rarely people may have other signs or symptoms, such as fever, chills, headache or nausea. These conditions may be the result of an associated sunburn rather than polymorphous light eruption.
Source:
https://www.mayoclinic.org/diseases-conditions/polymorphous-light-
eruption/symptoms-causes/syc-20355868
