Fordyce spots are?

Fordyce's spots are ectopic sebaceous glands which appear as whitish-yellow bumps on the edge of your lips (most common) / inside your cheeks/penis/scrotum/labia DD of Koplik's spots (pathognomonic of measles) Miliaria occurs due to obstruction of eccrine sweat glands. Fox Fordyce disease occurs due to obstruction of apocrine glands.