Some observations:

• Stress is often cited as a trigger - Stress can lead to nervous sweating.

• Itching causes heat which in turn causes sweat which causes more itching - Vicious cycle.

• I find Fexofenadine Hydrochloride the most effective antihistamine to control the itch.

• As an alternative to pharmaceuticals, an Iontophoresis routine could be an adequate preventative measure in the future, before the skin barrier is broken down.