Had Sebaceous Cyst On Penis. Red Bumps On Penis. What Is It?

Hi there,
I started off with a sebaceous cyst to the left of the frenulum of my penis I picked at it and found a hard white core it went away but came back 3 weeks later then 2 more came up on the frenulum so then they were frozen and the one near the frenulum just wiped away and came back 3 weeks later again but on top of the skin rather than under it is this possible? And the 2 on the frenulum one was a dull yellow colour and now has gone and has been for a month so main questions are can cysts be on top of the skin? And they also have tiny little red bumps on them and also the one not on the frenulum has a single small black dot on it but it isn't on the centre any idea what these can be?