Source: Fox News
Summary
Researchers at the University of Pittsburgh found that scratching a bug bite or rash may provide temporary relief but can prolong the itch and increase skin inflammation. The study, published in the journal Science, used mice to investigate the relationship between itch, scratching, and inflammation. The researchers found that scratching activated mast cells, which release histamine and other inflammatory chemicals, causing itchiness. The study suggests that scratching may provide some benefit by defending against bacterial skin infections, but the damage it causes to the skin likely outweighs this benefit when itching is chronic.
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The advice sounds familiar.
Scratching is a natural response to a skin irritant, but it can make certain diseases, such as eczema, worse. The study found that scratching activated mast cells, which release histamine and other inflammatory chemicals, causing itchiness. The researchers noted that mast cells are also important for protecting against bacteria and other pathogens. The study’s findings suggest that scratching may provide some benefit, but the damage it causes to the skin likely outweighs this benefit when itching is chronic. The American Academy of Dermatology recommends using cold compresses and 1% hydrocortisone cream to relieve itching.
The itch-scratch cycle has been studied for years, but the reasons behind its persistence remain poorly explored.
Author: Evan Null
