Dengue fever is caused by the mosquito bite that is infected with a dengue virus. It cannot be passed directly from one person to another, but it is spread by an Aedes mosquito bite. The mosquito gets infected when it bites the person having dengue virus. The dengue fever occurs mostly in tropical and sub-tropical areas. The symptoms of dengue fever are high temperature, skin rashes, nose bleeding, bleeding gums, severe headaches, joint and muscle pains, nausea and vomitings. It is very painful and weakening disease, which is also called as break bone fever. People with weakened immune systems and already had dengue infection will be at greater risk for severe infection like dengue hemorrhagic fever.