Poison Ivy Rash Stage 1. Poison ivy rashes are a result of contact with a poison ivy or poison oak plant. The rash doesn't usually spread unless urushiol is still in contact with your skin.

One can choose to place to the cucumber slices on the area that is affected thus producing a cooling effect or mash the cucumber into a paste then apply on the rash.
But a rash will only occur on areas of the skin that came into contact with the urushiol oil.
But sometimes it can take a few days after you had contact with the plant for a rash to appear. A poison ivy rash can be difficult to get rid of, and it might also spread to other parts of your body if you don't manage to get its resin off you soon. There are two ways to treat poison ivy with baking soda.