Photosensitivity
Photosensitivity — an increased sensitivity of the skin to ultraviolet and visible light, which can make it react more readily with redness, burning, or rash after sun exposure. It may be triggered by certain ingredients, medications, or underlying conditions, and it raises the importance of diligent sun protection.
Key points
- Photosensitivity can be caused by topical ingredients such as some retinoids and exfoliating acids, as well as certain oral medications and essential oils like bergamot.
- It generally falls into two categories: phototoxic reactions, which resemble an exaggerated sunburn, and photoallergic reactions, which involve an immune response.
- Skin that is more photosensitive is more prone to sunburn, irritation, and pigmentation changes with UV exposure.
- Using broad-spectrum sunscreen, protective clothing, and shade helps reduce reactions while the skin is more sensitive to light.
Frequently asked
Do exfoliating acids and retinoids cause photosensitivity?
They can make skin more sensitive to sun and are often used at night, which is why consistent daytime sunscreen is recommended when using them.
Is photosensitivity permanent?
Often it is temporary and resolves once the triggering ingredient or medication is discontinued, though this varies, and persistent reactions should be discussed with a healthcare professional.
Related topics
This is a foundational entry in the SYNC Skin Encyclopedia and is expanded over time. Educational information only — not medical advice.
