Belly button pimple with blood discharge

I applied nivea to clean belly button.Later a boil pop up inside belly button.Called a local doctor(general physician) he suggested to use betadine powder only.It got healed within few days.But after healing I observed the skin inside my navel got wrinkly & started catching dirt easily.Months later when again I tried washing the dirt inside belly button with soap and water (bcz of mild itching) later again a small pimple popped up with blood discharge on top of earbud when tried to clean.I visited a physician.He gave me some antibiotics & suggested betadine wash only and asked me to consult a gynecologist to determine hernia. visited a gynecologist(& laproscopic surgery specialist).He examined the area(not cough test though) and said its from skin & many ppl experience this.Nothing to worry.As I have small fibroids history had a lower abdomen sonography,nothing unexpected came.But again now I have a pimple inside navel after catching sweat(I perspire a lot) & dirt.HELP