What is your age?
How big is this lump? Is it gradually increasing in size?
It is MOST LIKELY a bartholin
cyst or a labial cyst
. It occurs due to block in the duct of the gland.
Other reasons which can cause such painless swelling in the labia are lipoma
or inguinal hernia
Very RARELY it can be due to tumour.
Therefore it is very important to see the gynecologist. This lump is not going to go away on its own.
If you have any further concerns, do contact me through Healthcare Magic. I will be happy to answer