Upper respiratory allergies and inflammation and swelling of the adenoids, the tissue at the back of the nose, can cause poor fluid drainage from the middle ear to the external ear and therefore cause a blockage in the Eustachian tube. Excess fluid can lead to middle ear congestion.
1 Black skin and Asian skin have thicker and more compact dermis than white skin. This is also why blacks and Asians have fewer facial wrinkles than whites. 2  Black skin has more casual lipids and more moisture in the stratum corneum than white skin.  Black skin has 50% lower ceramides than white or Hispanic skin.
Anyone who has ancestry or origin in Africa could be considered Black. The term Black is not just exclusive to African-Americans. It could include Dominicans, Cubans, Puerto Ricans, Haitians, Jamaicans, Brazilians, South Americans, East Indians, Polynesians, or any other group of people with African ancestors.ost African ethnic groups and some Caribbeans are considered black, as well as African Americans and black Hispanics. Indians are considered brown or just Indian, Middle Easterners are not considered black, Filipinos are Asian, and Samoans are simply Samoans. It seems that only blacks and whites are labeled colours.