Comedones may be closed or open. A closed comedo has an obstructed opening to the skin and may rupture to cause a low-grade skin inflammatory reaction in the area. The common name for a closed comedo is a whitehead. An open comedo has a wide opening to the skin and is capped with a blackened mass of skin debris. It is commonly known as a blackhead. Acne occurs when sebaceous glands of the skin begin to secrete oil during puberty.
Guam is an island in the western Pacific Ocean. It is a U.S territory officially known as the Territory of Guam. The official languages are Chamorro and English (influenced by U.S).
The Filipino language (Tagalog) is also spoken in northern parts of Camarines Norte as well as in the municipality of Del Gallego, Camarines Sur. Two Visayan languages, Sorsoganon and Masbate o or Minasbate, are spoken in Masbate and Sorsogon; they are collectively referred to as Bisakol.