Scientists working for the Department of Defense's Advanced Research Projects Agency are investigating whether LEDs can heal eye injuries and skin lesions.

FORBES: New Wrinkle in the Beauty Business

Brief exposure to high levels of PCBs and dioxins may cause skin lesions and affect the liver (the tolerated daily intake for dioxin is about 1 picogram - one trillionth of a gram - per kg body weight).

CNN: THE GREAT DIOXIN SCARE

In studies of monkeys, Galvus and another DPP-4 inhibitor being developed by Bristol-Myers Squibb and AstraZeneca have caused skin lesions.

FORBES: Magazine Article

Other autoimmune forms include dermatitis herpetiformis, which causes itchy skin lesions, and gluten ataxia, which affects brain tissue, resulting in unsteady gait and lack of motor control.

WSJ: New Guide to Who Really Shouldn't Eat Gluten

He resorted to rubbing messy steroid cream on his lesions and burning his skin in a tanning booth, running a serious cancer risk.

FORBES: Skin Deep

After noticing unusual lesions on her skin and being denied treatment by a private hospital because she couldn't pay, she turned to a two-year-old free healthcare clinic.

NPR: Cuban Doctors Staff Venezuela's Free Clinics

The skin lesions that come from prolonged exposure to arsenic are already evident on the hands and feet of many villagers.

ECONOMIST: Scientists have offered a solution to the arsenic wells