hi. for a few weeks now i have noticed a hard bump on the shaft of my penis (just below the head, on the left hand side). it feels like its under the skin. it is skin coloured and painless. it feels like a somewhat swelling and is a rather rectangular shape, the size is around 1cm in length and about 3mm in width. it has increased in size a bit. i tried popping it once as a white substance came from it once when doing so (much like a zit). however now nothing happens and it feels like its scarring up. i feel like it is an inflammed gland or something but im not sure. any help would be appreciated