Insulinomas are pancreatic neuroendocrine tumors (PNETs) responsible for inappropriate insulin release, leading to episodes of hypoglycemia. The diagnosis of insulinoma is suspected clinicaly andbiochemically made with low blood glucose, elevated insulin, proinsulin, and C-peptide levels, and confirmed by localizing the tumor ,usually, by non-invasive imaging techniques and for difficult cases invasive modalities could be needed.Herein, we present the case of a 15 years old female who had a 1 year historyof episodic and repetitive neuroglycopenicsymptoms without weight gain, and loss of consciousness resolved with ingestion of sugary foods. Initially a neuro-psychiatric pathology was suspected, the patient was on Sodium Valproate and Antidepressants (SSRIs)with no improvement.After thorough examinations, a pancreatic insulinoma was diagnosed. The patient had a successful resection of the tumor, and her symptoms disappeared entirely.