Contraindication: This product must not be used if skin lesions or open wounds are present. Warning: This product should not be used on individuals who have had skin cancer or have a family history of skin cancer. [cancer.org]

Phototherapy (UV therapy): Some skin problems (such as psoriasis) are helped by treatment with UV light. For a treatment known as PUVA, a drug called a psoralen is given first. The drug collects in the skin and makes it more sensitive to UV. [cancer.org]

The US Centers for Disease Control and Prevention (CDC) has also recommended ways for communities to help prevent skin cancer by reducing sun exposure, including educational interventions in schools and providing shade at schools, recreational sites, [cancer.org]