Polydipsia is a medical term that refers to excessive thirst or an increased desire to drink fluids. It is often a symptom of underlying health conditions, such as diabetes mellitus or diabetes insipidus, where the body either loses too much water or has difficulty regulating blood sugar levels. This condition can lead to frequent drinking and may result in increased urination. If someone experiences persistent thirst that disrupts daily life, it is important to consult a healthcare professional for proper evaluation and management.