The edge of the lip line itches a little. What should I do if my chin is a little peeling?

According to the report of Life Science in September 19, skin itching will stimulate nerves, making it impossible for patients to stop scratching the itchy place with their hands. Some people even scratch in their sleep. In severe cases, people will only feel pain.

1. Dermatitis is the main culprit of skin itching. Dermatitis is a skin disease caused by laundry detergent, gold and other things that can irritate the skin. Martin Schmerz, a neurophysiologist at Mannheim University in Germany, said: "Because of itchy skin, the quality of life of patients has declined. When patients suffer the same pain as itching, they seem to be able to bear it, but itching makes them helpless. "

2. Nerves can make us feel annoying and stinging. Although some nerve fibers are mainly used to feel pain and touch, there are other nerve fibers in the human body that specially feel itching. Histamine is protein secreted by human allergic reaction, which dominates some itchy nerves to transmit information to the spinal cord, and the information is processed in the spinal cord and fed back to the brain.

3. The areas activated in the brain during itching are very similar to those activated when we are in pain. Antihistamines can work by eliminating histamine's ability to send signals. However, histamine is not the only chemical in the human body that causes itching. About ten years ago, Schmeltz first discovered nerve fibers sensitive to itching. Recently, he discovered the existence of a new nerve fiber. Schmertz said, "Obviously, more than one nerve fiber stimulates itching. We have found a lot of information about histamine-sensitive itching fibers, and we are currently studying new itching fibers. This result may help to explain the causes of chronic pruritus more comprehensively. "

4. Itching is a precursor to many diseases. In fact, itching can be caused by contact with plants, animals and metal substances. Weather changes, bacteria, diseases and parasites can also affect itching, and stress can make itching worse.