Which skin condition is caused by sun exposure?

Actinic keratosis is a skin condition that results from prolonged exposure to ultraviolet (UV) radiation from the sun. This condition manifests as rough, scaly patches on the skin, often occurring on sun-exposed areas such as the face, ears, neck, and hands. Actinic keratosis is considered a precursor to skin cancer, making it particularly important for individuals who have had significant sun exposure to monitor any changes in their skin.

The development of actinic keratosis is linked directly to UV damage, highlighting why sun protection is crucial to prevent such conditions. This skin condition signifies how the skin's cellular structure can be altered due to environmental factors, specifically UV rays, leading to abnormal growths.

In contrast, other skin conditions like eczema and psoriasis have different etiologies that are not primarily linked to sun exposure. Eczema is often associated with genetic factors, allergens, and irritants, while psoriasis is thought to be an immune-mediated disorder. Acne is related to hormonal changes, oils, and bacteria in the skin rather than sun exposure. Understanding these distinctions is essential for recognizing the impact of environmental factors like UV radiation on skin health.