Aloe vera gel is pretty friggin miraculous when it comes to skin and all skin related problems. get the 100% prure stuff from "lily of the valley" at your local health food groovy type store. They make a gel which is thicker than the gelly.
Also keep the scar out of sunlight until it is healed.
A large glass of gin, taken orally, will reduce the itching, along with many other, sensations.
