Premenstrual syndrome (
PMS) refers to physical and emotional
symptoms that occur in the one to two weeks before a
woman's period. Symptoms often vary between women and resolve around the start of
bleeding. Common symptoms include
acne, tender breasts, bloating, feeling tired, irritability, and mood changes. Often symptoms are present for around six days. A woman's pattern of symptoms may change over time. Symptoms do not occur during
pregnancy or following
menopause.