Tumor
Excess insulin production can burn out the insulin-producing cells over time. You can't absorb glucose from the bloodstream without insulin, a hormone released by the beta cells in the pancreas. Normally, the pancreas releases just enough insulin to facilitate the uptake of glucose from the bloodstream into cells. Causes. Insulin release triggers cells to remove glucose from your bloodstream to use for energy. When you have insulin resistance, your cells don't respond properly to insulin. It takes a larger amount of insulin to get the cells to remove the glucose, so the pancreas increases insulin production and release. on the Body. Insulin is a hormone produced by the pancreas. Its function is to allow other cells to transform glucose into energy throughout your body. Without insulin, cells are starved for energy and must seek an alternate source. This can lead to life-threatening complications.  An insulinoma is a rare type of small pancreatic tumor. It produces an excess of the hormone insulin. About 90 percent of the time, the tumor is benign (non-cancerous). Because the tumor produces excess insulin, it can lead to low blood sugar. Low blood sugar is also known as hypoglycemia.  Glucose is important to the cells of the body, particularly the brain, as an energy source. However, the level of glucose in the blood must be regulated so that it does not rise too high. When the bloodstream contains glucose the pancreas is stimulated to produce the hormone insulin. Insulin causes glucose to be usable by the body cells and excess to be stored in the liver and muscles as glycogen.  The insulin also helps to store any excess glucose in the liver and in the fatty (adipose) tissues of the body. Pancreatic disease (chronic pancreatitis) or damage to the pancreas, in particular to the cells in the pancreas that produce insulin, can cause diabetes. This means that the pancreas makes less insulin, resulting in higher than normal blood glucose levels. It also produces digestive juices and enzymes to break down food. Image: Shutterstock.com. The pancreas helps to control blood glucose levels by producing insulin when the amount of glucose (a type of sugar) in the blood increases — for instance after a meal. Enlargement of beta cells of the pancreas that produce insulin (nesidioblastosis) may result in excessive insulin release, causing hypoglycemia. 1  Hormone deficiencies. 2  Certain disorders of the adrenal glands and the pituitary gland can result in a deficiency of key hormones that regulate glucose production. When the level of glucose in your blood rises, it signals certain cells (beta cells) in your pancreas, located behind your stomach, to release insulin. The insulin, in turn, unlocks your cells so that glucose can enter and provide the fuel your cells need to function properly. Insulin is a hormone that is made in the pancreas, an organ that lies behind the stomach in the abdomen. Insulin helps to move glucose (a type of sugar) from the blood into the cells of the body so that the cells can use the glucose as an energy source — during exercise for example. It also produces digestive juices and enzymes to break down food. Image: Shutterstock.com. The pancreas helps to control blood glucose levels by producing insulin when the amount of glucose (a type of sugar) in the blood increases — for instance after a meal. Continue ReadingPatient Guide to Insulin: About Diabetes. Insulin is a hormone made by the pancreas that allows your body to use sugar (glucose) from carbohydrates in the food that you eat for energy or to store glucose for future use. Insulin helps keeps your blood sugar level from getting too high (hyperglycemia) or too low (hypoglycemia) Insulinoma is a tumor of the pancreas that produces excessive amounts of insulin. Insulinomas are more common in women. The tumors are usually small (less than 2cm) and more than 90% of all insulinomas are benign (non-cancerous). Insulinomas produce excessive amounts of insulin and this causes low blood sugar. 
http://healthyeating.sfgate.com/can-produce-much-insulin-2833.html http://www.healthline.com/health/diabetes/insulin-effects-on-body http://www.healthline.com/health/insulinoma http://www.abpischools.org.uk/page/modules/hormones/horm6.cfm http://www.nps.org.au/conditions/hormones-metabolism-and-nutritional-problems/diabetes-type-2/for-individuals/what-is-type-2-diabetes/insulin-and-the-pancreas http://www.mayoclinic.org/diseases-conditions/hypoglycemia/basics/causes/CON-20021103 http://www.nps.org.au/conditions/hormones-metabolism-and-nutritional-problems/diabetes-type-2/for-individuals/what-is-type-2-diabetes/insulin-and-the-pancreas http://www.endocrineweb.com/conditions/type-1-diabetes/what-insulin http://www.surgery.usc.edu/divisions/tumor/pancreasdiseases/web%20pages/Endocrine%20tumors/pancreatic%20tumors/insulinoma.html
what is disease when pancreas produces excessive insulin