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.
Popping or ringing in the ears, a feeling that your ears have been clogged-these are possible side effects of a bad cold. If you have been having this popping for some time you may need to get a physical examination in order to ascertain the reason for this. You may find that you are suffering from some allergies. These allergies could be causing your ear to be clogged and may also cause the popping noise which is irritating you so much. This could also explain the pain that you are suffering from. You can try a simple breathing exercise to stop the popping in your ears. You can close right nostril with your thumb and breathe out through your left nostril. Now breathe in through the left nostril and then use the index finger to close this nostril.