Hyponatremia as a cause of seizure is frequently encountered in the emergency department. We report a case of a 40–year–old male who was brought to the emergency department with seizures. Initial investigations revealed hyponatremia. Upon correction of sodium he improved gradually, and the episodes of seizures got terminated. His history was remarkable for excess urination and excess of water consumption. He had similar episodes of seizures for 3 months. Upon further evaluation, we found out the cause for hyponatremia was Psychogenic Polydipsia secondary to Obsessive Compulsive Disorder (OCD). The patient was prescribed antidepressants and he was doing well on follow–up. Therefore, one must evaluate for the cause of hyponatremia while treating such cases so that the root cause can be corrected and therefore specific treatment can be given.