1) What headache means according to medical science: "Headaches in pregnancy 2nd trimester" Literally, headache means feeling of  pain or discomfort lying partly or fully in the head. Primary headaches are discomforts caused directly by over activity or on account of problems with the structures in the head that are pain sensitive. This includes the blood vessels, muscles and nerves of...

 1) An overview Literally, Migraine means pain/ discomfort felt partly or fully in the head. Primary headaches are discomforts lying  in the head  that are caused directly by the over activity or the structural problems in the head which are  pain sensitive. These include the blood vessels, muscles, nerves in the head and the neck. They may also result from changes i...