PMS, or premenstrual syndrome, refers to a range of physical and emotional symptoms that many individuals experience in the days leading up to their menstrual period. Common symptoms include mood swings, irritability, anxiety, and depression, which can vary in intensity from person to person. These changes are believed to be linked to hormonal fluctuations, particularly in estrogen and progesterone levels. The mood-related symptoms of PMS can impact daily life, affecting relationships, work, and overall well-being. While the exact cause of PMS is not fully understood, lifestyle changes, such as regular exercise, a balanced diet, and stress management techniques, may help alleviate some symptoms. In more severe cases, medical treatment options are available.