I am so stressed right now! 3 years back i got weird pimple type thing on the base of shaft of my penis! And those pimples occured in a pair seemed to he separated by a skin layer. When I squeezed them some black head type came out! And then after 1 year they turned out in a lumps! Now i am living with these lumps since 2 years! They look so weird! And they are kinda open from top! When i squeeze them nothing comesout! I went to a doc he said they are due to sebum! But i am still worried