Hi, welcome to our site. I am Dr Saumya Mittal. Read your query. That is a very significant question and i appreciate your problem. I will try my best to answer your query You will probably need an antibiotic. I would suggest you send the culture from the pus so we will know exactly what type of bacteria is there and what is the exact antibiotic it responds too Meanwhile continue dressing with betadine. And please stop switching over the counter medicines on your own. Medicines are not for you to decide. Even doctors, who have studied about what they prescribe make mistakes. Imagine what you must be doing. Suggest to meet a dr I hope this helps you. Inform the reports mentioned above so i can be of help further. Best of luck. I have given you the answer to the maximum considering the information provided. The results of the tests could further enhance my answer to you. Please do understand that some details could be extracted from a detailed history and examination. Looking forward to your return query with the details asked so that I can help you further. (If the answer has helped you, please indicate this)