1 Poison ivy, poison oak, and poison sumac are plants than can cause an itchy rash upon contact. 2  A substance called urushiol, found in these plants, causes the rash. 3  The rash is not contagious.  The rash usually disappears in one to three weeks.
Common factors that can cause clogged ears are wax buildup, air flow blockage to the Eustachian tubes, pressure differences in the middle ear, and cold and sinus problems. Clogged ears can affect people of all ages, but is most common among children, especially when they have colds.
There are few feelings more annoying than a clog in your ear! Itâs like a stuffy nose, but in the side of your head, and interrupting your hearing instead of your breathing. The only difference is that you can breathe through your mouth, but thereâs no other way to hear. The feeling of a clogged ear can be distracting, and it may even grow painful if the clog worsens.