Low blood sugar levels in the body may adversely affect the central nervous system. Some early symptoms include weakness, lightheadedness, and dizziness. Some other symptoms include nervousness, anxiety, and irritability. Untreated, severely low blood sugar can result in seizures, loss of consciousness, or death. Consult doctors at the Department of Diabetes and Endocrinology at Kokilaben Dhirubhai Ambani Hospital for help.