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The symptoms you have will depend on what's causing your pain.

See What are painful periods? for more about the two types of menstrual pain.

If you have pain during your periods that isn't caused by any medical condition, you may get:^{1 2}

• Sharp spasms (cramps), usually in the middle of your lower abdomen (pelvis)
• Pain that shoots to the back of your legs
• Pain that shoots to your lower back
• Nausea or vomiting
• Diarrhea
• Constipation
• Fever
• Headaches
• Feeling light-headed
• Feeling tired.

The pain usually comes on when your bleeding starts, and is worst during the heaviest days of your period.

If you have menstrual pain that is caused by a medical condition such as endometriosis, infection or a cyst, you may have:³

• Pain that starts later in life
• Pain that's not just in your middle or lower abdomen
• Pain at times other than the first couple of days of your period
• Pain during sexual intercourse
• Pain that is not helped by medication
• A discharge from your vagina.

You should talk with your doctor if you have any of these symptoms. Your doctor will want to find out what is causing your menstrual pain.

This information is for educational use only, and is not a substitute for prompt professional medical advice. Readers should always consult a physician or other professional for advice and treatment. ©BMJ Publishing Group Limited 2008. All rights reserved.