Number sign. Not to be confused with the Chinese character äº, the sharp sign (â¯), the viewdata square (â), the numero sign (â), the equal and parallel to symbol (â) or the game Tic-tac-toe's grid. The symbol # is most commonly known as the number sign, hash, or pound sign.
The poison ivy rash is not contagious. When a person touches the poison ivy leaf, a substance on the surface of the leaf (a resin) rubs off. Over the next 48 to 72 hours the skin reacts to the resin by becoming red and developing bumps and blisters at and around the site where the resin was.
Answer: Itâs Not Contagious. The poison ivy rash, known a contact dermatitis, can first appear as streaks or lines where the skin came into contact with the poisonous plant. A full blown rash usually occurs 12 to 48 hours after the initial contact, though in some cases, it may take up to a year.