what poisonous plant burns your skin
1 Poison sumac never has the wing margin on the midrib. 2  Plants have stiff hairs on stems and leaves. 3  Hairs contain irritants that are injected into the skin when the hairs break.  Stinging can cause rash, bumps, burning sensations, and swelling; symptoms usually have a short duration, but rash may persist for a few days.
The trouble with dieffenbachia is that it is often used as a houseplant. The plant (from the stalks down to the leaves) contain calcium oxalate needles. They can cause your skin to burn or itch and are also toxic to pets. Getty / Jerry Pavia.