Researchers have uncovered evidence that bacteria can activate nerve cells in the skin and cause the itchy sensation that comes along with several common skin conditions, according to a recent study in Cell. The authors note: “Staphylococcus aureus, a bacterial pathogen associated with itchy skin diseases, directly activates pruriceptor sensory neurons to drive itch.” Their findings could help optimize treatment for inflammatory skin conditions like eczema and dermatitis. A summary of the study in Axios also cites the prevailing assumption that the itchy symptoms that irritate patients with these conditions were generally believed to be caused by inflammation. However, the study reveals that S. aureus is to blame, the authors say, because it releases an enzyme that evokes the spontaneous itch and alloknesis.
The patient perspective: More than 31 million Americans have some form of eczema, according to the National Eczema Association. And some 6% of children worldwide do as well. Long-standing remedies suggested by the association to control eczema’s itch include a daily bathing and moisturizing routine, oatmeal soap, and prescription medications, including topical and immunosuppressant drugs.