Severe ear pain with pus discharge typically indicates an ear infection, which may have caused a small, temporary tear in your eardrum. Please do not put any ear drops into your ear yet, as some drops can be harmful if the eardrum is open. I highly recommend seeing a doctor promptly for a safe examination. To manage the pain in the meantime, you can take over-the-counter pain relievers like ibuprofen or acetaminophen. Keep your ear completely dry while bathing. Once examined, a doctor can prescribe the correct, safe antibiotic ear drops (such as ciprofloxacin) or oral medication to quickly clear this up.