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).
Chamorro language. Chamorro (Chamorro: Finu' Chamorro or Chamoru) is an Austronesian language spoken by about 47,000 people (about 35,000 people on Guam and about 12,000 in the Northern Mariana Islands). It is the native and spoken language of the Chamorro people who are the indigenous people of Guam and the Northern Mariana Islands, US territories.