30 is the most used remedy for styes.
Platanus occidentalis [Platan]
Dr. Chas. H. Hubbard called attention to this drug for chalazion, sacral cysts and styes. The use of this drug goes back to the days of Dioscorides for such ills of the eye-lids. Burnett recommended it in five drop doses, three times a day. Is reported to cure the oldest and most obstinate cases. Possibly a smaller dosage would answer, say, the 3d potency. Also bathe with a weak lotion of the tincture and water.