Medically reviewed by William Truswell, MD Hearing loss is classified into three types: conductive, sensorineural, and mixed (when conductive and sensorineural hearing loss co-occur). Conductive ...

Head cold vs. sinus infection A head cold occurs when a viral infection causes symptoms primarily in the head, such as a stuffy nose or a headache.

It’s possible the infection will need antibiotics to heal and leaving it untreated for too long could lead to complications, which can be serious or, in very rare cases, life-threatening.

A salivary gland infection is also called sialadenitis and is caused by bacteria or viruses. A salivary stone or other blockage of the salivary gland duct can contribute to an acute infection. Chronic ...