An abscess may be red, hot, or tender and appear under the skin on your neck, says Jeffrey Fromowitz, MD, a dermatologist in Boca Raton, Florida. A fatty cyst, on the other hand, will not be inflamed.

Labia pimples are also treatable and can be prevented. Bumps on the vulva are common, but there's not a lot of research on the condition. Some evidence suggests that the pimples can look similar ...