All parts of a poison sumac plant are poisonous, and the oils remain active even after the plant dies. Symptoms of a poison sumac rash typically appear 8 to 48 hours after exposure and can last ...

Poison oak rash is an allergic reaction to the leaves or stems of the western poison oak plant (Toxicodendron diversilobum). Home remedies and medical treatments can help manage symptoms.

Antihistamines and topical corticosteroids may help relieve symptoms. Poison ivy, poison oak, and sumac grow in wooded and marshy areas. Their sap contains an allergen called urushiol. Urushiol ...

Poison sumac: Look for seven to 13 smooth leaflets ... Red bumps that appear in straight lines or streaks Swelling The symptoms of poison ivy rash can worsen over the days following contact.

If you're outdoorsy, chances are you've encountered poisonous plants such as poison ivy, poison oak, or sumac. But what does ...