Smoking is also associated with secondary amenorrhea. Sometimes tumors
of the ovaries and brain may also cause absence
of menstruation.
Some of these causes are modifiable like if you are having stress then yoga and meditation and antianxiety medicines can help you out. Eat regular healthy, nutritious food and indulge in moderate exercises. If still the symptoms do not improve, then consultation from a doctor is required to rule out PCOS or thyroid disorder.