Conversation: The conversation between human and AI assistant.
[|Human|] I have a puss lump come up on my perianus almost once a month and in the same place. It starts off as a lump that is  itchy and then will get puss and then turn into what feels like a sore with a crater in the middle. I get it a couple of days before my period starts. I have had a perianal tear from child birth. What is this and how can I treat it?
[|AI|]  Thanks for your question on Chat Doctor. I can understand your situation and problem. By your history and description, in my opinion, following are the possible causes for your symptoms. 1. Anal fistula 2. Boils 3. Infected sebaceous cyst. So better to consult surgeon and get done clinical examination. You have to get done surgical removal of whole lump with proper surgical Chat Doctor.  You may also need antibiotics. Also rule out diabetes as it can cause recurrent skin infection. Avoid moisture and keep proper hygiene of anal region. Hope I have solved your query. I will be happy to help you further. Wish you good health. Thanks.