Final answer:
Bacterial conjunctivitis is the inflamed sebaceous gland of the eyelid caused by a bacterial infection. Common symptoms include erythema and tenderness.
Step-by-step explanation:
The inflamed sebaceous gland of the eyelid caused by a bacterial infection is known as bacterial conjunctivitis. It is characterized by inflammation of the conjunctiva, which is the membrane lining the whites of the eyes and the inner eyelids. Symptoms of bacterial conjunctivitis include erythema (redness) and tenderness, along with a yellow, green, or white discharge and encrusted eyelashes.