Unfortunately we cannot diagnose online. The only way to know for sure if this bump is cause by an STI is to have it checked by a health care provider. They will be able to take a full health history from you and do any testing that may be needed.
You can use our “Find a clinic” function to locate a clinic in your area.
Please leave a comment to let us know if this answers your question or if you need more information.
For other readers, please feel free to leave a comment, or let us know if this was helpful.