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 State of Mexico (Spanish: Estado de MÃ©xico, pronounced [esËtaÃ°o Ã°e Ëmexiko] ( listen)) is one of the 32 federal entities of Mexico. It is the most populous, as well as the most densely populated state. It is divided into 125 municipalities and its capital city is Toluca de Lerdo.