When you tan indoors, machines deliver high doses of ultraviolet (UV) radiation to your body. UV radiation damages your skin cells. The damage to your skin cells from UV radiation is what causes your body to produce melanin, the pigment that darkens skin color.
Each time you tan, you increase your risk of the following:
Cancer
Indoor tanning can cause skin cancer , including basal and squamous cell carcinomas and melanoma. All skin cancers, but especially melanoma, can be deadly. Tanning also increases the risk of eye cancer.
Burns
Indoor tanning can cause first- or second-degree skin burns.
Eye Damage
Indoor tanning can cause severe burns to the cornea (the clear outer covering of the eye). Greater lifetime UV exposure also increases your risk of cataracts - which is the clouding of the eye's lens that affects vision.
Skin Reactions
Tanning while using certain medications or cosmetics can increase sensitivity to UV radiation and cause exaggerated skin burns, itching, scaling, rashes or swelling. Medications and products that may make you more sensitive to UV radiation include, but are not limited to:
Tanning weakens your immune system and can worsen some existing medical conditions. For example, people treated for Herpes simplex may have recurring cold sores, and the effectiveness of vaccines may be weakened.
Operators of indoor tanning facilities in New York City are required to follow guidelines to limit your risk of illness and injury from tanning. Operators also must provide all tanning customers with a health risk fact sheet .