Is It Normal to Have Low Back Pain During Pregnancy or Your Period?
Dr. Rob Letizia PT, DPTShare
Medically reviewed by Dr. Rob Letizia, PT, DPT · Doctor of Physical Therapy, 25+ years treating spine & orthopedic conditions · Last reviewed 2026-10-15
Your lower back aches, and it lines up with something: you are pregnant, or you think you might be, or it is the week of your period, or it is mid-cycle. The question people type is almost always the same one: is this normal?
Usually, yes. But each of those situations has its own version of normal and its own short list of things that are not, and the not-normal list is what decides whether you call a doctor today. This guide answers each one in turn, with a source for every clinical line.
Is it normal to have low back pain during pregnancy?
Yes, it is one of the most common symptoms of pregnancy. More than two-thirds of pregnant women experience low back pain, almost one-fifth experience pelvic pain, and both typically increase as pregnancy advances, getting in the way of work, daily activities and sleep (Liddle & Pennick, Cochrane Database of Systematic Reviews, 2015).
Part of the reason is preparation for birth: during pregnancy the ligaments soften and stretch to prepare for labour, which can strain the joints of the lower back and pelvis (NHS: back pain in pregnancy).
What is not normal. Contact your GP, OB or midwife urgently if you have back pain and you are in your second or third trimester, because that can be a sign of early labour; or you also have a fever, vaginal bleeding or pain when you pee; or the pain is in one or both sides, under your ribs. Go to an emergency department if you lose feeling in one or both legs, your buttocks or your genitals (NHS: back pain in pregnancy).
Is it normal to have low back pain in early pregnancy?
It can happen. The pattern the research describes, though, is pain that builds as pregnancy advances (Liddle & Pennick, Cochrane Database of Systematic Reviews, 2015), so a back ache in the first weeks deserves the same check as any other: does it behave like a back, and did anything come with it?
In early pregnancy the "came with it" list matters most. Back pain together with vaginal bleeding, a fever or pain when you pee is a reason to contact your GP, OB or midwife urgently (NHS: back pain in pregnancy).
Does lower back pain mean I am pregnant?
Not on its own. Lower back pain is common in people who are not pregnant, so it cannot tell you either way. A pregnancy test can. If you think you might be pregnant and you have severe or recurring one-sided lower belly pain, get urgent advice rather than waiting (NHS: ovulation pain).
Is it normal to have low back pain during your period?
Yes. Period pain happens when the womb tightens during your period, and the cramps in your lower belly can spread to your back and thighs (NHS: period pain). A back ache that arrives with your period and leaves with it, with cramps in the lower belly alongside it, fits that pattern.
What is not normal. See a doctor if your periods become more painful, heavier or irregular, if the pain stops you doing your usual daily activities, or if you also have bleeding between periods, pain during sex, pain when peeing or pooing, or unexplained weight loss. Endometriosis, adenomyosis, fibroids and pelvic inflammatory disease can all cause painful periods (NHS: period pain).
Is it normal to have low back pain during ovulation?
Ovulation pain is real, but it is usually felt in the lower belly on one side, not in the back. It can be a dull ache or sharp twinges, it can switch sides from cycle to cycle, and it lasts from a few minutes to 1 or 2 days, about 14 days before a period (NHS: ovulation pain).
So a mid-cycle back ache that clearly changes with bending, sitting or lifting is more likely to be your back than your ovary. Get urgent advice if the pain is severe and painkillers have not helped, if it keeps coming back, or if you think you may be pregnant (NHS: ovulation pain).
The 3-Question Is-It-Normal Check
Whatever the timing, three questions sort most of it out. One answer on its own settles nothing; the pattern does.
- Does it line up with the timing? Back pain that builds through pregnancy, or arrives with your period and leaves with it, fits a common pattern. Pain that does not follow the timing it seems to belong to needs a second look.
- Does movement change it? If a particular movement makes it worse and a position eases it, it is behaving like a back: muscles, joints and ligaments. Pain that is the same whatever you do is less likely to be mechanical.
- What came with it? Back pain alone is usually ordinary. Back pain with a fever, vaginal bleeding, pain when you pee, pain under the ribs at the side, rhythmic tightening in the second or third trimester, or lost feeling in the legs, buttocks or genitals is not, and the red-flags section below says who to call.
The Timing-Movement-Company Rule
If it fits the timing, changes with movement and comes alone, it is very likely one of the common, normal versions. If it comes with anything from question 3, call the right clinician today, not next week.
Pregnancy, Period or Ovulation: The Side-by-Side Table
| When it happens | What is common | Not normal: who to call |
|---|---|---|
| Early pregnancy (first trimester) | Low back ache can occur, though back pain more typically builds as pregnancy advances | With vaginal bleeding, fever or pain when you pee: your GP, OB or midwife urgently |
| Second and third trimester | Very common: more than two-thirds of pregnant women have low back pain | Back pain in the second or third trimester can be a sign of early labour: your OB or midwife urgently |
| Around your period | Cramps in the lower belly that spread into the back and thighs | Periods getting more painful, heavier or irregular, or pain that stops your normal day: your doctor |
| Mid-cycle (ovulation) | Ovulation pain is felt on one side of the lower belly, for minutes up to 1 to 2 days | Severe pain painkillers do not help, pain that keeps coming back, or you may be pregnant: your doctor, urgently |
| Any time, with numbness | Never | Lost feeling in the legs, buttocks or genitals: emergency department now |
Sources: Liddle & Pennick, Cochrane Database of Systematic Reviews, 2015; NHS: back pain in pregnancy; NHS: period pain; NHS: ovulation pain.
What helps low back pain during pregnancy?
The research on this is clearer than most people expect. In the Cochrane review of 34 trials and 5,121 pregnant women, land-based exercise reduced low back pain and back-related disability compared with usual prenatal care, though the evidence was graded low quality (Liddle & Pennick, Cochrane Database of Systematic Reviews, 2015). Everyday measures from the NHS: bend your knees and keep your back straight when you lift, avoid heavy lifting, wear flat shoes, balance shopping bags, support your back when you sit, and rest, especially later in pregnancy (NHS: back pain in pregnancy).
Your OB or midwife is the first call for new back pain in pregnancy, and the right person to clear you for an exercise programme.
Red flags: when low back pain is not normal
Go to an emergency department now for:
- loss of feeling in one or both legs, your buttocks or your genitals (NHS: back pain in pregnancy).
Contact your OB, midwife or GP urgently for back pain with:
- being in the second or third trimester of pregnancy, which can be a sign of early labour;
- a fever, vaginal bleeding, or pain when you pee;
- pain in one or both sides, under your ribs (NHS: back pain in pregnancy).
See a doctor about period-related pain if:
- periods are becoming more painful, heavier or irregular, or the pain stops your usual daily activities;
- you have bleeding between periods, pain during sex, or unexplained weight loss;
- the pain is severe and painkillers have not helped (NHS: period pain).
Our back pain red flags guide covers the red flags that have nothing to do with pregnancy or your cycle, and our kidney-or-back guide covers pain that sits higher, under the ribs.
Started with an AI assistant? Bring the plan in.
ChatGPT, Gemini and Claude will all tell you that back pain in pregnancy or around your period is common, and that part is right. What none of them can do is ask the follow-up questions in the check above, or examine you. If an assistant has given you a plan, bring it, and the timing and symptoms you have noticed, to the clinician who knows your history: your OB or midwife in pregnancy, your doctor for period or mid-cycle pain.
Frequently asked questions: is my low back pain normal?
Is it normal to have low back pain during pregnancy?
Yes. More than two-thirds of pregnant women experience low back pain, and it typically increases as pregnancy advances (Liddle & Pennick, Cochrane, 2015). Ligaments soften and stretch to prepare for labour, which can strain the joints of the lower back and pelvis. It is not normal if it comes with a fever, vaginal bleeding, pain when you pee, pain under the ribs at the side, or loss of feeling in the legs or genitals; in the second or third trimester, back pain can also be a sign of early labour. Contact your OB or midwife urgently for any of those.
Is it normal to have low back pain in early pregnancy?
It can happen, but low back pain more typically builds as pregnancy advances rather than starting in the first weeks (Liddle & Pennick, Cochrane, 2015). Back pain in early pregnancy together with vaginal bleeding, a fever or pain when you pee should be reported to your GP, OB or midwife urgently.
Does lower back pain mean I am pregnant?
Not on its own. Lower back pain is very common in people who are not pregnant, so it is not a dependable sign of pregnancy. A pregnancy test is the way to know. If you think you might be pregnant and you have one-sided lower belly pain that is severe or keeps coming back, contact your doctor urgently.
Is it normal to have low back pain during your period?
Yes. Period pain is caused by the womb tightening, and the cramps can spread from the lower belly into the back and thighs (NHS). See a doctor if your periods become more painful, heavier or irregular, if the pain stops your usual daily activities, or if you also have bleeding between periods or pain during sex. Conditions such as endometriosis, adenomyosis and fibroids can cause painful periods.
Is it normal to have low back pain during ovulation?
Ovulation pain is usually felt on one side of the lower belly, not the back. It can be a dull ache or sharp twinges and lasts from a few minutes to 1 or 2 days, about 14 days before a period (NHS). Back pain that changes with how you move is more likely to be your back itself. Get urgent advice if the pain is severe and painkillers have not helped, keeps coming back, or you think you may be pregnant.
When should I worry about lower back pain?
Go to an emergency department for loss of feeling in one or both legs, the buttocks or the genitals. Contact your doctor, OB or midwife urgently for back pain with a fever, vaginal bleeding, pain when you pee, or pain under the ribs at the side, and for back pain in the second or third trimester of pregnancy, which can be a sign of early labour.
About Spectrum Therapeutics in Wayne and Northern New Jersey
Spectrum Therapeutics of NJ is a one-on-one physical therapy clinic in Wayne, serving Passaic County and Northern New Jersey, led by Dr. Rob Letizia, PT, DPT. This guide is written to answer a question people ask often, not as a substitute for care from your OB, midwife or doctor. For back pain in pregnancy, start with your OB or midwife.
