Skin and Hair Care

Robert Shmerling, M.D.

Tattoos, moles, and melanoma

A new report suggests that skin cancer can sometimes hide in a tattoo. Writing in JAMA Dermatology, three German clinicians describe the case of a young man who wanted to remove large, multicolored tattoos on his arms and chest. During the removal process, his doctors discovered a suspicious mole inside the tattoo. It turned out to be cancerous—stage II melanoma. Tattoos may make it difficult to evaluate moles. Laser removal therapy is also problematic when moles are present. If you are considering getting a tattoo, either make sure it will be applied to skin that is free or moles or birthmarks, or have your doctor check any moles in the to-be-tattooed area beforehand. If you are planning to have a tattoo removed, check for moles within the tattoo. If you see any, ask your doctor or dermatologist to check them out before starting laser therapy.

Patrick J. Skerrett

New treatment for head lice effective with one dose and no combing

As a parent who has dutifully combed nits from my children’s hair, the promise of a no-comb treatment for head lice sounds mighty appealing. An article in today’s New England Journal of Medicine looks like a slam dunk for such a treatment, a medication called ivermectin (Sklice). In two trials, one dose of ivermectin and no nit-combing did vastly better than a placebo treatment. Side effects were also minimal. Keep in mind that the trials didn’t test ivermectin against the current standard treatment using lotions made with permethrin or pyrethrins. And they included under 800 people in carefully controlled situations. That means we don’t really know the true effectiveness, side effects, safety profile, and interactions with other drugs. Until more is known about side effects and how ivermectin stacks up against other treatments, it seems wise to follow the current guidelines from the American Academy of Pediatrics. They call for the use of an over-the-counter product containing permethrin or pyrethrins as a first salvo against head lice, along with combing wet hair with a fine-toothed comb to remove nits.

Patrick J. Skerrett

New anti-lice lotion is good news for nitpickers

The FDA’s approval this week of an old drug called ivermectin for treating head lice comes as good news to folks who shudder at the thought of using a nit comb to remove lice. It will be sold as a lotion under the brand name Sklice. Ivermectin works by interfering with nerve and muscle cells in […]

Kay Cahill Allison

Is sunlight addictive?

Is sunlight addictive? That provocative idea was raised by Dr. David Fisher, chief of dermatology at Massachusetts General Hospital in Boston, in a presentation at Harvard Medical School. He cited new evidence suggesting that being in the sun stimulates the so-called “pleasure center” in the brain and releases a rush of feel-good chemicals like endorphins, much as happens with addictive substances or activities. Why? Humans need vitamin D to survive. Once upon a time, it came mainly from skin—skin exposed to sunlight makes vitamin D. So the feelings of pleasure we get from sunlight may be part of a survival mechanism to get us the vitamin D we need.

Patrick J. Skerrett