4. Baking soda and water
Drying out a poison ivy rash can drastically shorten the amount of time it takes to heal this rash. For this remedy, mix together three teaspoons of baking soda with one teaspoon of water to create a paste. Apply the paste directly onto the rash and allow it to dry. The agents in the baking soda will start working to dry out the rash right away, not only speeding up the healing time but providing relief from the itching, too. Alternatively, you could mix a cup of baking soda into cool bath water for instant relief.