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.
Often it is simply due to a clogged ear, which refers to a blockage in the ear canal. Symptoms of a clogged ear include reduced hearing capacity, a popping sensation in your ear, a windy sound inside the ear, and a feeling of having mucus or liquid within the ear.ou can easily get rid of clogged ears by performing the Valsalva maneuver. It will relieve stuffiness and pain in the ear. 1  Close your mouth and pinch your nostrils closed with your fingers, then take a deep breath. 2  Blow air out of your nose to regulate the air pressure.