Blocked follicles: Whiteheads, or closed comedones, are due to hair follicles that are plugged by a combination of keratin (skin flakes) and sebum (skin oil).
Answered 11/30/2016
5.8k views
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more.
Ask your question