What is a characteristic symptom of PMS?

The characteristic symptom of premenstrual syndrome (PMS) is the presence of cyclic distressing physical and psychological symptoms. PMS is defined by a range of symptoms that occur in a predictable pattern, usually beginning in the luteal phase of the menstrual cycle and resolving shortly after menstruation starts. These symptoms can include emotional disturbances such as irritability, mood swings, and anxiety, along with physical symptoms like bloating, breast tenderness, and fatigue. The cyclical nature of these symptoms differentiates PMS from other conditions that may cause consistent or constant symptoms, which reflects the distinctive pattern associated with PMS. In summary, the cyclicity and the blend of both physical and psychological symptoms are key to identifying PMS.