A patient presents to the urgent care center with a painful, red lump on their eyelid. The lump has grown over the past two days and now has a central area of pus. What is the most likely diagnosis and recommended treatment?
A:Chalazion; warm compresses and topical steroids
B:Allergic conjunctivitis; prescribe antihistamine eye drops
C:Hordeolum; warm compresses and antibiotic ointment
D:Blepharitis; clean the eyelid margins with warm water and baby shampoo