Hello, this is Dr K.. Answers are not medical advice and do not constitute a doctor/patient relationship. I look forward to helping you today.
Hello and welcome.
This is probobly a sebaceous cyst. Its due to a blocked pore and is like a pimple.
They commonly occur in this area and the rest of the labia, due to friction.
You can likely get it to burst with hot compresses and compression.
Friction from the two sides rubbing together.
You should let the Dr know it is there or he may not notice at all