Run water on the affected area. Gradually change the temperature from 'warm' to 'as hot as you can stand it' without scalding yourself. This releases the histamines, which cause the itching of the skin. They take about 6-8 hours to build back up thus giving you 6-8 hours of itch-free relief!
I have recently had poison ivy, and everyone who has had it will try just about everything to stop the itch. Something that I tried and helped clear up the outbreak: I took a small amount of a shampoo like Head and Shoulders and just rubbed it on the affected area and let it dry. Soon after I did this the itching was relieved and the area seemed to have cleared up. This worked for me and hopefully it will for others.
Make a paste with the baking soda and water. Apply the paste to the skin where poison ivy is. The paste will dry and fall off. As the paste dries, it will help dry up the poison ivy.
Take burdock and yellow dock to aid the healing process.
Apply aloe vera gel, baking soda and water, jewelweed juice, or lobelia extract to the affected areas for itching and blistering.
Take goldenseal and vitamin C every day for inflammation.