Home > Diabetes > What is hypoglycemia? Get the Flash Player to see this player. Rate: (Click the stars to rate) Published on Aug 22, 2008 by SSreenan, Views: 4141 What is hypoglycaemia? Hypoglycemia is when the blood sugar becomes too low. The symptoms of hypoglycemia are sweating, shaking, racing heartbeat, confusion, seizures, or unconsciousness. When these symptoms occur, diabetes must check their blood sugar. If the sugar is low, they need to eat something with sugar, to raise the level.