Premenstrual tension refers to all the mental and physical changes that occur in a woman’s body during menstruation. Each menstrual cycle in women follows the same plan: the days before ovulation last from 12 to 90 days, usually this occurs from 20 to 55 days. When the egg begins to ovulate, the follicle bursts, the egg is released into the vagina and is fertilized by sperm, forming a zygote, which develops into an embryo and attaches to the wall of the uterus, beginning the process of embryogenesis. During the next menstrual cycle, a woman will prepare to become pregnant for the development of the baby, so her body will adjust to receive the right amount of nutrients for the embryo. Therefore, some women who are preparing to become pregnant or who have had abnormalities, such as defective eggs or if the embryo died, may experience premenstrual tension syndrome.
This form of illness is more associated with psychological problems, since during the menstrual period the reproductive organs cease their activity. Any regular, severe changes in mood or mental state, as well as changes in a person's mood and behavior, can usually be associated with emotional stress or hormonal instability.