Hi, i have a pea sized lump just on the inside of my anus. Its isn s really sore, but it is itchy. I ve found a few cases on the internet, and it seems like its nothing to worry about, but rather be safe than sorry. I m male, 14 years old and consider myself rather healthy P.S i have been on a course of antibiotics recently, and i cant remember if this issue coincides with the antibiotics.