Copper coil and heavy periods: what to know

The copper device does not contain hormones. It creates a local environment that prevents pregnancy, and this can increase menstrual flow or cramping for some people. Changes are often most noticeable in the first few cycles, although symptoms that continue to disrupt daily life should not be dismissed.

A heavier period may involve needing to change period products more often, passing larger clots, bleeding through clothes or bedding, or having bleeding that lasts longer than your usual pattern. Keep a simple record of the days, products used, clots, pain, and any bleeding between periods.

The coil may be contributing, but it is not the only possible explanation. Conditions such as uterine fibroids, adenomyosis, endometrial polyps, or changes around perimenopause can also affect bleeding. Polycystic ovary syndrome may cause irregular bleeding. Heavy blood loss can contribute to iron deficiency anaemia, which may cause tiredness, breathlessness, dizziness, or paleness.

Arrange a review if bleeding is difficult to manage, has changed suddenly, or remains heavy beyond the settling-in period discussed at insertion. A clinician can check the coil position, review your bleeding pattern, assess for anaemia, and consider other causes. Do not remove the coil yourself.

For suitable people, a clinician may discuss pain relief or medicines that reduce menstrual bleeding. The choice depends on your medical history, other medicines, pregnancy plans, and whether the coil is still the right contraceptive option. Seek advice before starting treatment, particularly if you have a history of blood clots, stomach ulcers, kidney problems, or medication allergies.

Seek urgent medical help for very heavy bleeding with faintness, severe weakness, chest discomfort, or difficulty breathing. Get prompt assessment for severe or worsening pelvic pain, fever, unusual discharge, pain during sex, or a positive pregnancy test with pain or bleeding.

Contact a clinician promptly if you cannot feel the coil threads, they feel different, or you can feel hard plastic at the cervix or in the vagina. These changes can indicate that the coil has moved and may affect contraceptive protection. Use backup contraception until you have received advice.

Ask: Could the coil position or another condition explain this bleeding? Should I have a blood test for iron deficiency anaemia? What treatment is suitable with my health history? Would a different contraceptive method be more comfortable? What symptoms should make me seek urgent help?