Irregular periods are common during puberty or just before the menopause and in these cases treatment is usually not necessary.
But if you're worried because your periods are particularly heavy, last a long time or are more frequent than monthly, or if you get bleeding or spotting between periods or after sex, see your GP. Read the box on this page for more specific advice on when you should see your GP.
Your GP will ask questions about your periods, your lifestyle and your medical history to find out the underlying reason for your irregular cycle.
Any treatment that is necessary will depend on the reason for your irregular periods.
Changing your method of contraception
If you have recently been fitted with an intrauterine device (IUD) and you are experiencing irregular bleeding that does not settle within a few months, discuss changing to another method of contraception with your GP or practice nurse.
If you have started taking a new contraceptive pill that is causing irregular bleeding, you may be advised to change to another type of pill.
Treating polycystic ovary syndrome
For overweight women with polycystic ovary syndrome (PCOS), the symptoms can be improved by losing weight, which will also help with irregular periods. By losing weight, your body does not need to produce as much insulin, which reduces testosterone levels and improves your chance of ovulation (releasing an egg each month).
Other treatments for PCOS include hormone treatment and diabetes medication. For more information, see Treating polycystic ovary syndrome.
Treating an overactive thyroid
Treatment for an overactive thyroid aims to return the level of thyroid hormones in your blood to normal. You may need to take medication to stop your thyroid gland producing too many hormones. See Treating hyperthyroidism for more information on this and other treatments.
Your menstrual cycle should return to normal after your overactive thyroid is treated. If it does not, go back to your GP.
Counselling and stress management
Stress or sudden weight loss may be diagnosed as a cause of irregular periods. Relaxation techniques, stress management or counselling (talking to a therapist) may be recommended.
