Styes are infection of Moll & zeis gland present in every body eye lids ,basically infected by staphylococci.styes are very painful swelling near the root of eye lashes, you need oral antibiotics&anti inflammatory tablet as well as antibiotic ointment to apply locally.Hot fomentation helps to some extent in styes.

do hot foamentation. put antibiotics eye drops 2hourly e.g. moxifloxacin and take oral anti inflammatory and antibiotics tab e.g. diclogesic and ciplox 500 one tab twice daily

Hello Try A.warm Compresses B apply antibiotic ointment like moxifloxacin twice daily over lid margins C systemic antibiotic like ciprofloxacin 500twice daily can be used if you are not allergic to  ciprofloxacin It may take a week for recovery Having said that it is provisional diagnosis Kindly share photos of your eye so that I may guide you better Regards