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).
Guam is an island in Micronesia in the Pacific Ocean that is part of the United States. It is a territory and not one of the 50 U.S. States. The people that first lived there are called Chamorros. The capital of Guam is the city of HagÃ¥tÃ±a.