The words you are looking for, cold and catarrh, are spelt correctly in the question.

To get rid of catarrh in the ear, you can use an antihistamine. Decongestant nasal sprays and drips can help if you have a cold that cause catarrh and in most cases, it will clear up on its own.

catarrh

how long does it take for amoxicillin to work i have catarrh in my ear have been taking them for two days

Catarrh is usually caused by an infection such as the common cold. It often clears up by itself within a few days but a good cure for catarrh is to inhale the steam from hot water in a bowl that has been mixed with a small amount of eucalyptus oil.