痒感多由蚊虫叮咬、过敏等引发的局部炎症产生，通过细直径慢神经元经脊髓丘脑束传导至大脑。而皮肤中的机械感受器能感知触摸和震动，其信号通过粗直径快神经元经背柱传导。脊髓内两类神经元通过中间神经元交联，触摸信号会激活抑制痒感传导的神经元，这就是 “闸门理论”—— 触摸能 “关闭” 痒感通道。此外，触摸刺激大脑深层结构会反向抑制痒感传递，功能性磁共振成像研究还显示，挠痒能激活大脑奖励中枢，带来愉悦感。

The FDA is warning about a rare but serious side effect about severe itching after stopping some allergy medications including Zyrtec, Xyzal, and Allertec. An unsuspecting group of women is getting ...

Galderma (SIX: GALD), the pure-play dermatology category leader, today released new clinical data confirming nemolizumab’s rapid onset of action on itch and sleep, with significant improvements ...

Swimmer’s itch is a rash caused by an allergic reaction to the larvae of microscopic parasites that are found in both fresh and saltwater. These parasites commonly live in snails, which secrete larvae ...

(NEXSTAR) – Officials in coastal and lakeside municipalities in several parts of the country have issued alerts about “swimmer’s itch” in recent weeks, perhaps prompting a few would-be beachgoers to ...

Officials in coastal and lakeside municipalities in several parts of the country have issued alerts about “swimmer’s itch” in recent weeks, perhaps prompting a few would-be beachgoers to rethink their ...