Clogged ears can be caused by external factors like changes in altitude but are commonly caused by a cold or virus. Excess earwax or an ear injury can also lead to clogged ears. Yawning, chewing gum, ...

A fish allergy, as opposed to a shellfish allergy, is one in which your immune system reacts abnormally to a finned fish such as tuna, halibut, or salmon. It is a somewhat less common form of food ...