Hello and welcome to HCM,
The fluid filled painful lump on the labia can be due to Bartholinitis.
Bartholinitis is inflammation of bartholins gland.
Bartholins glands are a pair of gland located near the vaginal opening along the
labia minora.
Collection of secretions can lead to enlargement of these glands.
Superimposed infections make these glands painful.
There is possibility of
furunculosis also i.e. inflammation of hair root since the area is rich in hair follicles.
The pain has relieved and fluid has escaped after you ruptured it, however, complete evacuation needs to be done followed by an antibiotic course.
I suggest you to consult your gynecologist to clinical examine the lesion, diagnose it and prescribe definitive treatment for it.
Bartholinitis is managed by deroofing the lesion so that recurrence does not occur.
Furunculosis is managed by a course of antibiotics. This will lead to re-absorption of the left secretions in the lesion.
Thanks and take care
Dr Shailja Puri