"PMS cramps" is how most of us describe it, but cramps before and during your period have their own name and their own cause. Knowing the difference helps you pick what actually works, and spot when pain isn't normal.
Written by Vita Globe Editorial Team | Reviewed against ACOG guidance, Cochrane reviews and NIH MedlinePlus
What actually helps PMS cramps?
The best-studied options are nonsteroidal anti-inflammatory drugs (NSAIDs) such as ibuprofen or naproxen and heat. A Cochrane review of 80 trials found NSAIDs relieve menstrual pain far better than placebo[1], and a meta-analysis found heat therapy eased period pain in small trials[2]. MedlinePlus suggests starting an NSAID the day before your period is expected and using a heating pad on your lower belly[3].
Caveat: NSAIDs aren't right for everyone and can cause side effects, including stomach upset. Check with a doctor or pharmacist, and see a provider if pain is severe or getting worse.
Sources: Cochrane NSAIDs review · Jo & Lee 2018 · MedlinePlus: Painful periods · Verified 2026-09-28
IN THIS ARTICLE
Are PMS cramps and period cramps the same thing?
Not exactly. PMS is a set of physical and emotional symptoms in the week or two before your period, and cramping is on the list[4]. Dysmenorrhea is the medical term for painful periods, the cramping that usually peaks as bleeding starts.
In practice they overlap: many people feel cramps in the day or two before bleeding and through the first days of their period. The distinction matters because the causes, and the best fixes, are different. PMS mood symptoms respond to things like exercise, sleep and some supplements. Menstrual cramps respond best to medicines that target their cause.
ACOG notes that painful periods are the most common menstrual symptom in teens and young women[5]. Most cases are primary dysmenorrhea, meaning there's no underlying pelvic disease[5]. Secondary dysmenorrhea is caused by another condition, such as endometriosis or fibroids[5][3].
What causes menstrual cramps?
Before and during your period, the uterine lining releases prostaglandins, hormone-like chemicals that make the uterus contract. Higher prostaglandin activity means stronger contractions and more pain[3]. That's why the most effective medicines for cramps are the ones that block prostaglandin production[1].
What actually helps menstrual cramps?
1. NSAIDs, taken early
NSAIDs such as ibuprofen and naproxen block the enzymes that make prostaglandins. A Cochrane review of 80 randomized trials with 5,820 women found NSAIDs worked much better than placebo: where about 18% of women on placebo got moderate-to-excellent relief, 45% to 53% did on NSAIDs[1]. No single NSAID clearly beat the others[1].
Timing helps. MedlinePlus suggests starting an anti-inflammatory the day before your period is expected and taking it regularly for the first few days[3]. The trade-off: NSAIDs caused more side effects than placebo, mostly digestive[1]. Follow the label, take them with food, and ask a doctor or pharmacist if you have stomach, kidney or bleeding problems or take other medications.
2. Heat
A heating pad or heat patch on your lower belly is simple and low-risk[3]. A 2018 meta-analysis of six small trials found heat eased menstrual pain compared with an unheated patch or no treatment, though the authors called the evidence suggestive and asked for larger trials[2].
3. Movement
Regular aerobic exercise is part of standard advice for painful periods[3] and for PMS[4]. Gentle movement during your period can help too.
4. Prescription options
If NSAIDs and heat aren't enough, hormonal birth control is a common next step for painful periods. ACOG notes that if symptoms don't improve within three to six months of treatment, a clinician should look for other causes[5].
When are cramps a sign of something more?
Cramps that respond to over-the-counter treatment are usually normal. See a provider if you have[3][5]:
- Pain that keeps you home from school or work, or gets worse over time
- Pain that doesn't improve after about three months of treatment
- Sudden or severe pelvic pain, or pain outside your period
- Fever, unusual or foul-smelling discharge
- Painful periods that start later in life after years of easier ones
Persistent, severe cramps despite NSAIDs and hormonal treatment can be a sign of endometriosis, the leading cause of secondary dysmenorrhea in teens[5].
The honest summary
- Cramps before and during your period are mostly driven by prostaglandins, not the same mechanism as PMS mood symptoms.
- NSAIDs, started early, and heat have the best evidence.
- Severe, worsening or treatment-resistant pain deserves a doctor's visit.
Our option
Vita Globe Her PMS Gummies
Her PMS Gummies aren't a pain reliever and aren't made for cramps. They're designed for the other side of the premenstrual week: the occasional moodiness, irritability and tension that can show up before your period.* Each two-gummy serving has 20mg of vitamin B6 and a 111mg PMS Support Blend of chasteberry, cranberry and dong quai. For adults only; not for use during pregnancy or nursing.
KEEP READING
How to Relieve PMS Symptoms Naturally · PMS Bloating: What Helps · PMS Mood Swings and Irritability
Frequently asked questions
Why do I get cramps before my period starts?
Prostaglandins released as the uterine lining prepares to shed trigger contractions, and some people feel them a day or two before bleeding[3].
What is the best painkiller for period cramps?
NSAIDs such as ibuprofen and naproxen have the strongest evidence, and no single NSAID has clearly outperformed the others[1].
Does a heating pad really help cramps?
Small trials suggest it does, sometimes comparably to pain relievers, but the evidence is limited[2].
How bad is too bad for period cramps?
The Office on Women's Health says to see a provider if period pain or bleeding causes you to miss school or work[6]. Pain that makes you vomit or faint deserves a call too.
Can cramps be a sign of endometriosis?
They can. Endometriosis should be considered when significant cramps persist despite NSAIDs and hormonal treatment[5].
Sources
- Marjoribanks J, Ayeleke RO, Farquhar C, Proctor M. Nonsteroidal anti-inflammatory drugs for dysmenorrhoea. Cochrane Database Syst Rev. 2015;(7):CD001751. doi:10.1002/14651858.CD001751.pub3
- Jo J, Lee SH. Heat therapy for primary dysmenorrhea: a systematic review and meta-analysis of its effects on pain relief and quality of life. Sci Rep. 2018;8(1):16252. doi:10.1038/s41598-018-34303-z
- National Library of Medicine. Painful menstrual periods. MedlinePlus Medical Encyclopedia. Reviewed 2024. medlineplus.gov/ency/article/003150.htm
- U.S. Department of Health and Human Services, Office on Women's Health. Premenstrual syndrome (PMS). womenshealth.gov. womenshealth.gov/menstrual-cycle/premenstrual-syndrome
- American College of Obstetricians and Gynecologists. Dysmenorrhea and Endometriosis in the Adolescent: ACOG Committee Opinion No. 760. Obstet Gynecol. 2018;132(6):e249–e258. doi:10.1097/AOG.0000000000002978
- U.S. Department of Health and Human Services, Office on Women's Health. Your menstrual cycle. womenshealth.gov. womenshealth.gov/menstrual-cycle/your-menstrual-cycle
About the Vita Globe Editorial Team
The Vita Globe Editorial Team researches and writes our wellness content, working from peer-reviewed research, systematic reviews and guidance from bodies such as the NIH and the FDA. We cite our sources inline and update articles when the evidence changes.
These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. This article is for informational purposes only and is not a substitute for medical advice. Talk to your healthcare provider before starting any new supplement, particularly if you are pregnant, nursing, taking medication, or caring for a child.
