PHOTOALLERGY Meaning and
Definition
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Photoallergy is a medical term used to describe an abnormal reaction of the skin to sunlight or certain other forms of light, primarily ultraviolet radiation. It refers to an allergic response that occurs specifically when the skin is exposed to light, resulting in the development of an allergic skin rash or irritation.
In individuals with photoallergy, exposure to light triggers the release of certain chemicals in the body, causing an immune response that leads to skin inflammation. This immune reaction can be sparked by various agents, such as certain medications, chemicals from cosmetic products, fragrances, or sunscreen ingredients. Unlike phototoxicity, which causes direct damage to the skin upon exposure to light, photoallergy is an immune-mediated response.
The symptoms of photoallergy typically include redness, itching, swelling, and the formation of small blisters or hives on the skin that was exposed to light. These symptoms may appear within hours or days after exposure and can persist for several days or even weeks.
Treatment for photoallergy usually involves avoiding the triggers that cause the reaction, such as discontinuation of medication or avoidance of certain substances known to induce the condition. Topical corticosteroids or antihistamines may be prescribed to alleviate the symptoms. Sun protection measures, including the regular use of broad-spectrum sunscreens, protective clothing, and seeking shade during peak sunlight hours, are crucial in preventing photoallergy and reducing the risk of flare-ups.
Common Misspellings for PHOTOALLERGY
- ohotoallergy
- lhotoallergy
- -hotoallergy
- 0hotoallergy
- pgotoallergy
- pbotoallergy
- pnotoallergy
- pjotoallergy
- puotoallergy
- pyotoallergy
- phitoallergy
- phktoallergy
- phltoallergy
- phptoallergy
- ph0toallergy
- ph9toallergy
- phoroallergy
- phofoallergy
- phogoallergy
- phoyoallergy
Etymology of PHOTOALLERGY
The term "photoallergy" is derived from two roots: "photo-" and "-allergy".
1. "Photo-" comes from the Greek word "phōs", meaning "light" or "sunlight". It is commonly used in scientific and medical terms related to light or visual processes, such as photography, photovoltaic, photometer, etc.
2. "-Allergy" comes from the Greek word "allergia", which means "allergic response" or "hypersensitivity". In modern usage, it refers to an adverse reaction of the body's immune system to a particular substance or stimulus.
By combining these two roots, "photoallergy" specifically denotes a type of allergic reaction or sensitivity that occurs upon exposure to light, particularly sunlight or artificial light sources. In the medical context, it refers to a condition where the skin becomes hypersensitive or allergic when exposed to light.
