irregular menses

Hi Anna,
Have your periods been irregular since you first started menstruating? Or have they become irregular recently? Long term irregularity may indicate a hormonal problem, since an interaction of hormones controls the menstrual cycle. You need to be seen by a gynecologist to have a physical examination and specific blood test to determine the exact reason for the irregularity.
The sudden change in regularity or short term irregular periods can be cause by stress, poor diet, excessive exercising, being underweight as well as being very overweight, a major change in your routine or the use of certain medications.
I hope this information is helpful.

Maryann