What is a good remedy for poison sumac?

Poison sumac can be treated effectively with calamine lotion, according to WebMD. The itchiness and burning can be soothed by applying cold ice and pressure to the affected location for 15 to 20 minutes at a time. Antihistamines are also shown to help with symptoms.

Those that suspect they have come in contact with poison sumac should wash the exposed area with soap and water to help prevent a rash, suggests WebMD. Clothing that comes in contact with these plants should be laundered, as the oil that causes skin irritation may remain on the fabric for a period of time. Individuals with severe allergic reactions or complications from extreme exposure should seek medical attention.