Insulinoma is a rare type of tumor that develops in the pancreas, specifically in the cells that produce insulin. These tumors can cause excessive insulin production, leading to low blood sugar levels, a condition known as hypoglycemia. Symptoms may include confusion, sweating, weakness, and fainting. Diagnosis typically involves blood tests to measure insulin and glucose levels, along with imaging studies like CT scans or MRI to locate the tumor. Treatment often requires surgical removal of the tumor, and in some cases, medication may be used to manage symptoms if surgery is not possible.