The causes of PMS are not fully understood, however it is thought that PMS occurs due to the hormonal turbulence that occurs at the end of the menstrual cycle. Genetics also seem to play an important role since PMS seems to be more common among twins.

Bad breath can be embarrassing, but primarily it can be a symptom for an impending dental ailment. While you should immediately consult a doctor in such cases, you can start taking some preventive measures at home.