Hi there ~
I understand your concerns. Circumcision
has nothing to do with the red lump in the underside of your penis. The itching and white discharge may be due to an infection either in your urinary tract
or a sexually transmitted infection if you have been sexually active. I also believe that the area need physical examination and you need to consult a local doctor who can do so and prescribe the right tests and medications for you.
I hope this helps. Take care and have a lovely day!