A string of pearls refers to little swellings (about 1-3mm) some guys have on the penis, around the coronal ridge.
These bumps are the pearly penile papules, which run around the rim of the penis head like a string of pearls. There can be just one row, but some have two or three strings close together.
The incidence reportedly ranges from 8-48%. Some suggest an increased incidence in both uncircumcised and black men.
The pearly penile papules are a normal part of the skin’s anatomy. It’s completely innocent and requires no treatment. They persist throughout life, but may become less noticeable with increased age.
Pearly penile papules may look like genital warts in the initial stage. So if you notice these little bumps after you had unprotected sex you should visit your GP and get it checked out to make sure it’s nothing serious.