Some light-based treatments might help calm down angry, inflamed skin by copying how sunlight naturally balances certain chemicals in your skin, which could make conditions like eczema or psoriasis feel better.

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Evidence from Studies

Supporting (1)

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Photo-induced nitric oxide modulation in human skin: Impacts of geographic location and seasonality on health and disease.

Narrative Review

Human

2026 Mar

Sunlight helps your skin make a healing molecule called nitric oxide that calms inflammation. The study shows that fake sunlight (photonic therapy) might work the same way to help treat skin diseases like eczema and psoriasis.

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Source Study

Photo-induced nitric oxide modulation in human skin: Impacts of geographic location and seasonality on health and disease.

Score: 1

DOI: 10.1016/j.jphotobiol.2025.113349

Similar Assertions

When your skin is exposed to sunlight, it releases a natural substance called nitric oxide that helps calm down harmful molecules in your skin and keeps things balanced — but this doesn't work right if you have long-term skin inflammation.

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When there's less sunlight in winter or far from the equator, your skin makes less nitric oxide from sunlight, which can upset the balance in your skin and make conditions like psoriasis or eczema worse.

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76%

Sunlight can create harmful molecules in your skin, but your body naturally produces nitric oxide to balance them out—this balance keeps your skin healthy.

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73%

Certain types of sunlight, specifically a narrow band of UV light between 340 and 370 nanometers, can trigger a helpful chemical reaction in your skin that releases nitric oxide — which might one day be used to treat health problems.

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72%