In medicine, photosensitivity is an abnormal reaction of the skin to light. There are two types: photoallergy and phototoxicity. [1][2] The photosensitive ganglion cells in the mammalian eye are a …

Mar 24, 2025 · If your symptoms are a side effect of a medicine or skin care product, stopping or reducing its use may help photosensitive reactions go away. Be sure to check with your healthcare …

Mar 30, 2018 · Photosensitivity is an extreme sensitivity to ultraviolet (UV) rays from the sun and other light sources. Most people are at risk of developing sunburn during long exposure to sunlight. …

You can become photosensitive as a result of prescription or over-the-counter medications, a medical condition or genetic disorder, or even by using certain types of skin care products. There are two …

May 7, 2024 · What is a sun allergy? Despite the name, a "sun allergy" is not truly an allergy to the sun. Instead, it is an immune system reaction in the skin triggered by sunlight, most often causing an itchy …

In phototoxicity, light-absorbing compounds directly generate free radicals and inflammatory mediators, causing tissue damage manifesting as pain and erythema (like sunburn). This reaction does not …

People with very white skin who don’t tan on exposure to the sun (Fitzpatrick skin type 1), especially if they also have red hair and blue eyes, are often considered photosensitive, relative to people with …

Feb 4, 2026 · Photosensitivity is a skin reaction caused or worsened by sunlight. What increases my risk for photosensitivity? What are the signs and symptoms of photosensitivity? Your signs and …

Sep 15, 2025 · Photosensitivity can have various underlying causes, ranging from medical conditions to genetic predispositions. Some common causes include: Certain genetic conditions, such as …

Feb 9, 2026 · Skin light sensitivity (photosensitivity) means you have an unusual reaction to light. Learn more about skin light sensitivity symptoms and treatments.