Premenstrual syndrome is a condition that affects many women. Describe premenstr

Premenstrual syndrome is a condition that affects certain women and may cause distressful symptoms such as constipation, diarrhea, nausea, anorexia, appetite cravings, headache, backache, muscular aches, edema, insomnia, clumsiness, malaise, irritability, indecisiveness, mental confusion, and depression. These symptoms may begin two weeks before the onset of menstruation. Although the exact cause of this syndrome has not been determined, it may be due to the amount of prostaglandin produced, a deficient or excessive amount of estrogen or progesterone, or an interrelationship between these factors.