Hello and welcome to HCM.
Thank you for your query.
It appears that you could be suffering from an infection. All your symptoms match that of an infection, for which I request you to visit your doctor. It is difficult to pin-point a particular condition without physically examining you and conducting laboratory examinations. Which is why you will have to visit a doctor and get yourself diagnosed, treatment will follow.
A
swollen labia minora could be due to dry
masturbation, dry intercourse, friction from undergarments, lubricants, menstrual pad, soap, scratching, bruising and various other reasons. The infection is of prime concern. For this swelling, I would advise warm sitz baths with epsom salt, warm compresses and wearing comfortable cotton lose undergarments, or avoiding undergarments completely till you get better.
I hope I have succeeded in providing the information you were looking for. Please feel free to write back to me for any further clarifications at: http://doctor.healthcaremagic.com/doctors/dr-shoaib-khan/64581I would gladly help you.
Best wishes.