Yes drop in blood pressure causes various health problems . normally blood pressure is maintained at 80/120. But during certain circumstances the blood pressure may drop due to stress or tension or medical reasons like diabetes or kidney problems. it may also lead to different problems like head ache, nausea, vomiting and excessive sweat. You may find your legs getting trembled, and weak feeling. A very bad drop in blood pressure may also lead to heart attacks. In order to over this you need to have a glass of water containing electoral powder and salt and sugar in the solution instantly. This will help the person to get his Blood pressure back to normal.