Excessive sun exposure is a common cause of brown spots on the scalp due to conditions such as melasma and actinic keratosis, per the Mayo Clinic and the American Academy of Dermatology. While these conditions differ slightly from each other, they both are frequently caused by excessive ultraviolet radiation. Continue Reading.
Mexico is a part of North America. Maybe you are thinking of Northern America, which is a tricky area as sometimes Mexico is included and sometimes it is not. Northern America â¦ is the northern portion of North America, in which Canada and the United States are usually the two sole members.
The Gulf of Mexico is that body of water contained by Florida, Alabama, Mississipi, Louisiana, Texas, Mexico and part of Cuba.Minor edit?ind the United States, and go south to Texas. Mexico is south of the United States, bordering Texas, New Mexico, Arizona and California. Mexico's neighboring countries are â¦ the United States Of America to the north, and Guatemala and Belize to the south.