In type I the body stops making insulin or makes small amounts. Without insulin glucose cannot get into your cells which is needed to burn for energy. Glucose will collect in the blood. Over time high levels of glucose in the blood may hurt the eyes, kidney, nerves, or heart. Type I occurs mostly in people under 30, though it may occur at any age. The signs may come suddenly and be quite severe. The symptoms may include frequent urination, constant hunger, constant thirst, weight loss, weakness, fatigue, edginess, mood changes, nausea, and vomiting. People with type I have to take insulin. No one knows for sure why people get type I insulin. Some people are born with the genes that increase there chances of receiving diabetes. But many people with the same genes don't receive diabetes. It is suggested that another stimuli inside or outside the body triggers the disease. It is unknown what that stimuli is. People have a high level of autoantibodies in the blood before being diagnosed. Antibodies are proteins that the body makes to destroy germs and viruses. Autoantibodies are antibodies that have "gone bad". They attack your bodies own tissues. Autoantibodies may attack insulin or cells that make insulin. The second type of diabetes is called Diabetes Insipidus or type II. In type II the body does not make enough insulin, or the body has trouble using insulin. People with type II may inject insulin but they do not depend on it to live. Type II affects mostly people over 40 but it can affect younger people as well. The symptoms include frequent urination, constant thirst, constant hunger, weight loss, weakness, dry-itchy skin, blurred vision, numb hands/feet, fatigue, and infection of skin gums, bladder or vagina that heal slowly or keeps coming back. Type II runs in families, being overweight brings it on. It is common in people who eat too much fat, eat too little carbohydrates and fiber, and get too little exercise.