What is the primary definition of balanitis?

The primary definition of balanitis is inflammation of the glans penis or clitoris. This condition typically arises due to various causes, including infections, poor hygiene, or certain dermatologic conditions. It is characterized by symptoms such as redness, irritation, and swelling at the tip of the penis or clitoris.

While other options may describe related issues or symptoms, they do not accurately define what balanitis specifically is. For instance, an infection of the penile shaft is a different condition known as posthitis or balanoposthitis if it involves the shaft as well. The assertion that it is a condition affecting only elderly males is misleading since balanitis can occur in individuals of any age, not just the elderly. Lastly, while allergic reactions can lead to inflammation of the glans, they represent a potential cause rather than the definition of balanitis itself. Thus, option B most accurately captures the essence of what balanitis is.