An unamed 22-year-old woman has made medical history after doctors confirmed that she's got a third nipple on the bottom of her foot. Warning: Following images might be disturbing to some viewers.

That dark mound that might look like an overcooked wart is really in fact a hairy areola. This condition is clinically referred to as supernumerary breast tissue and affects between 1%-5% of the total population, but usually occurs above the waist. So the fact that it's ended up on the bottom her foot is truly remarkable to medical science:
"A 22-year-old woman sought medical care for a lesion in the plantar region of her left foot, a well-formed nipple surrounded by areola and hair. Microscopic examination of the dermis showed hair follicles, eccrine glands, and sebaceous glands.

Fat tissue was noted at the base of the lesion. Clinical and histopathologic findings were consistent with the diagnosis of supernumerary breast tissue, also known as pseudomamma.

To our knowledge, this is the first report of supernumerary breast tissue on the foot. Supernumerary breast tissue, known as SBT, is rarely found beyond the mammary line. But they have been seen before on the back, shoulder, face, and even thigh."
The lady's tit foot doesn't hurt and it's been there since birth. We just think it's icky.