What should you know about copper coil for heating water?

A copper coil, also called a copper IUD, is a small device placed inside the uterus by a trained clinician. It does not heat the body or water. Copper changes the local environment in the uterus, making it difficult for sperm to move and fertilise an egg. The [Copper IUD Device](/materials/copper-iud-device/) page gives more detail about its shape and use.

Arrange a consultation so the clinician can review your health, pregnancy possibility, periods and contraception goals. They can explain fitting, expected cramps or spotting, thread checks and follow-up. If you prefer an option that releases hormone inside the uterus, read about the [Hormonal Coil](/treatments/contraception-and-family-planning/hormonal-coil/). Do not place any heating coil or household device in or near the body.

After a medical coil is fitted, contact your clinician for severe pain, fever, unusual discharge, very heavy bleeding or concern that the device has shifted. Sudden intense pain, fainting or feeling acutely unwell needs urgent assessment. These symptoms should not be explained by a household heating product without examination.

Ask which intrauterine options fit your needs, how insertion is performed, what symptoms are expected, and who to contact if the threads feel different.