Premenstrual syndrome (PMS) is a vast range of symptoms that can take place in women before their period starts. Symptoms cover such things as fatigue, mood swings, bloating, and regular headaches. The cause of PMS is unknown, but it is thought to be related to changes in hormone levels. PMS symptoms can be caused by a variety of things, but the most common causes are identified in women who are experiencing the symptoms for the first time. PMS symptoms can vary depending on the person but can generally be described as a feeling of stress and anxiety. Some people also experience cramps and breast tenderness.
