Menstrual Cramps

Is this your child's symptom?

  • Cramps in the lower belly or pelvis. They start during the first 1 or 2 days of a girl's period.
  • Cramps only happen during menstrual bleeding
  • Report of similar cramps in the past are helpful
  • Cramps often don't start until periods are present for over 1 year

Cause

  • The medical name for painful cramping during a girl's period is dysmenorrhea.
  • Normal cramps happen in over 60% of girls.
  • This cramping is caused by strong muscle squeezing of the uterus. This is triggered by a high prostaglandin (a hormone) level.
  • An egg release from the ovary (ovulation) is needed to cause cramping. Therefore, the onset is most often 12 months or more after the first period.
  • Medical causes of severe menstrual cramps include pelvic inflammatory disease (PID) and endometriosis. An ovarian cyst can also cause very bad cramping.

Age of Onset of Menstrual Cramps

  • Peak age of onset: 1 to 2 years after periods first start
  • During the first year after periods start, only 7% or less of teens will have cramping. Some of these girls will have a medical cause such as a blockage.

Pain Scale

  • Mild: your child feels pain and tells you about it. But, the pain does not keep your child from any normal activities. School, play and sleep are not changed.
  • Moderate: the pain keeps your child from doing some normal activities.  It may wake her up from sleep.
  • Severe: the pain is very bad. It keeps your child from doing all normal activities.

When to Call for Menstrual Cramps

When to Call for Menstrual Cramps

Call Doctor or Seek Care Now

  • Pregnant or could be pregnant (late or missed period)
  • Not able to walk like normal
  • Fever
  • More severe cramps than ever before
  • Your teen looks or acts very sick
  • You think your teen needs to be seen, and the problem is urgent

Contact Doctor Within 24 Hours

  • Vaginal discharge that is not normal started before period began
  • Pain only on 1 side
  • You think your teen needs to be seen, but the problem is not urgent

Contact Doctor During Office Hours

  • Cramps last more than 3 days
  • Cramps keep your teen from doing normal activities even after using pain medicine
  • Vomiting or diarrhea also present
  • Pelvic cramps happen when not bleeding
  • You have other questions or concerns

Self Care at Home

  • Normal menstrual cramps

Call Doctor or Seek Care Now

  • Pregnant or could be pregnant (late or missed period)
  • Not able to walk like normal
  • Fever
  • More severe cramps than ever before
  • Your teen looks or acts very sick
  • You think your teen needs to be seen, and the problem is urgent

Contact Doctor Within 24 Hours

  • Vaginal discharge that is not normal started before period began
  • Pain only on 1 side
  • You think your teen needs to be seen, but the problem is not urgent

Contact Doctor During Office Hours

  • Cramps last more than 3 days
  • Cramps keep your teen from doing normal activities even after using pain medicine
  • Vomiting or diarrhea also present
  • Pelvic cramps happen when not bleeding
  • You have other questions or concerns

Self Care at Home

  • Normal menstrual cramps

Care Advice for Menstrual Cramps

What You Should Know About Menstrual Cramps:

  • Cramps happen in over 60% of girls.
  • Pain medicines can keep cramps to a mild level.
  • Cramps can last 2 or 3 days.
  • Here is some care advice that should help.

Ibuprofen for Pain:

  • Give 2 ibuprofen 200 mg tablets 3 times per day for 3 days.
  • The first dose should be 3 tablets (600 mg) if the teen weighs over 100 pounds (45 kg).
  • Take with food.
  • Ibuprofen is a very good drug for cramps. Advil and Motrin are some of the brand names. No prescription is needed.
  • The drug should be started as soon as there is any menstrual flow. If you can, start it the day before. Don't wait for cramps to start.
  • Note: acetaminophen products (such as Tylenol) are not helpful for menstrual cramps.

Naproxen if Ibuprofen Doesn't Help:

  • If your teen has tried ibuprofen with no pain relief, switch to naproxen. No prescription is needed.
  • Give 220 mg (1 tablet) every 8 hours for 2 or 3 days.
  • The first dose should be 2 tablets (440 mg) if the teen weighs over 100 pounds (45 kg).
  • Take with food.

Use Heat for Pain:

  • Use a heating pad or warm washcloth to the lower belly. Do this for 20 minutes 2 times per day. This may help to reduce pain.
  • A warm bath may also help.

Stay Active:

  • It's fine to go to school.
  • Your teen can take part in sports during her period.
  • She can also swim, bathe, or shower like normal.

What to Expect:

  • Cramps last 2 or 3 days.
  • They will often happen with each period.
  • The cramps sometimes go away for good after the first pregnancy and delivery.

Call Your Doctor If:

  • Neither ibuprofen or naproxen helps the pain
  • Cramps cause her to miss school or other events
  • Pain lasts over 3 days

Copyright 2000-2025 Schmitt Pediatric Guidelines LLC. Date Updated: Mar 31 2025 13:41 Version 0.1

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February 12, 2026
There are cases of measles in NC, and we are aware of exposures in Chapel Hill, Durham, and Wake County. We can give the MMR dose early to families who want it. This applies to infants 6-12 months who have not gotten a dose yet or kids under 4-5 years who have not gotten their second MMR dose. At this time, the NC DHHS and health departments are not recommending this unless traveling or living in an area with sustained transmission. 2 doses of the MMR vaccine are highly effective (97%) at preventing measles infections. At CHCAC, children receive their first dose at 12 months of age and a second dose at 4 years of age, ensuring they are fully protected as soon as possible, in accordance with the most up-to-date AAP recommendations. Some infants aged 6 months to 11 months who travel internationally or in high-prevalence areas may need a dose to protect them; however, they still require the 1-year and 4-year-old doses as well. If you are ever concerned about a possible exposure to measles, please CALL before entering our office. DO NOT ENTER the office. NC DHHS keeps a list of areas with measles exposures here . This is a highly contagious illness, and special precautions must be taken to prevent spread. The virus can be present in the air for 2 hours after an infected person is in the room, and 90% of susceptible patients can be infected. As always, if you have questions, we are here to help make sense of it all!
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