Scientists discover what makes our skin itch
Have you ever wondered why we itch? Often even without a clear reason?
That's something a group of scientists have looked into, and they think they now have the answer. Experts at Harvard Medical School have discovered that the itchy sensation is caused by a special type of cell found in bacteria.
The bacteria - called Staphylococcus aureus - make us itch by acting directly on our nerve cells.
The researchers conducted an experiment exposing the skin of mice to the bacteria and found that they developed an itchy sensation over several days.
Not only did the bacteria themselves make the animals itchy, but they also made them hypersensitive.