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.
Cities Also Located in Mexico. Mexico. Mexico is a country is north America located south of Texas. The capital of Mexico is Mexico City, its official language is Spanish although Native American languages are spoken and the country has a population of 112.3 million people. The currency used in this country is the Peso (MXN).