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.
Warm Water. Flushing with warm water will also help open up a clogged ear. 1  Fill an ear syringe with a cup of warm water. 2  Tilt your head to the side as much as you can and pull your ear lobe down to open up the ear canal.