What is a hallmark symptom of a hordelum?

A hordoleum, commonly known as a stye, is characterized by the presence of a painful, swollen lump on the eyelid. This condition occurs when a gland in the eyelid becomes blocked, often leading to local inflammation and discomfort. The hallmark symptom, therefore, is the painful lump, which can be red and tender to the touch.

While itchy eyelids may occur due to various other conditions such as allergic reactions or blepharitis, and dry eye syndrome presents with a different set of symptoms related to insufficient tear production, they do not specifically indicate a hordoleum. Fluffy patches on the iris are typically associated with other ocular conditions and are not typical signs of a stye. Thus, the correct identification of the painful lump as the hallmark symptom provides clarity in distinguishing this condition from others affecting the eyelids and surrounding structures.