Many medical conditions, such as those listed below, can affect your hearing health. Treatment of these and other hearing losses can often lead to improved or restored hearing. If left undiagnosed and untreated, some conditions can lead to irreversible hearing impairment or deafness. If you suspect that you or your loved one has a problem with their hearing, ensure optimal hearing healthcare by seeking a medical diagnosis from a physician.
Smell begins at the back of nose, where millions of sensory neurons lie in a strip of tissue called the olfactory epithelium. The tips of these cells contain proteins called receptors that bind odor molecules. The receptors are like locks and the keys to open these locks are the odor molecules that float past. People have about 450 different types of olfactory receptors. Each receptor can be activated by different odor molecules, and each odor molecule can activate several types of receptors.
onsillitis refers to inflammation of the pharyngeal tonsils (glands at the back of the throat, visible through the mouth). The inflammation may involve other areas of the back of the throat, including the adenoids and the lingual tonsils (tonsil tissue at the back of the tongue). There are several variations of tonsillitis: acute, recurrent, and chronic tonsillitis, and peritonsillar abscess. Viral or bacterial infections and immunologic factors lead to tonsillitis and its complications. Nearly all children in the United States experience at least one episode of tonsillitis. Due to improvements in medical and surgical treatments, complications associated with tonsillitis, including mortality, are rare.