Impetigo is a skin infection caused by bacteria like streptococcus or staphylococcus. These bacteria mostly attack the children skin but some adults may also get this infection. It is manifested by red spots which become large with time and filled with crusty fluid and become itchy. These crusts may appear anywhere on the body. This is a contagious disease so direct contact with the infected person should avoid. For treatment purposes washing of crusts and antibiotic ointments are prescribed.