Scratching an itch worsens eczema and skin inflammation, study finds
Fox News • • health
Key Points:
- Scratching a bug bite or rash provides only temporary relief but worsens inflammation and prolongs itching, according to University of Pittsburgh researchers studying allergic-contact dermatitis in mice.
- The study found that scratching activates mast cells, which release histamine and other chemicals that increase inflammation and perpetuate the itch-scratch cycle.
- Mice prevented from scratching or lacking itch-sensing neurons experienced less inflammation, highlighting scratching’s role in exacerbating skin irritation.
- Despite its negative effects, scratching may have evolved as a defense mechanism by activating mast cells that help reduce harmful bacteria like Staphylococcus aureus on the skin.
- Experts recommend alternatives such as cold compresses and 1% hydrocortisone cream to relieve itching without the harmful consequences of scratching.
