Second-Trimester Pelvic Pain: Causes, Risks & Relief

Feeling sharp twinges at your pubic bone, a deep ache in your hips, or a pulling sensation when you roll over in bed? You’re not alone. Pelvic pain during pregnancy—especially in the middle months—can be unsettling, but there are clear explanations and effective ways to feel better.

Key takeaway: Most pelvic girdle pain in pregnancy is manageable and not harmful to your baby. Early support makes a big difference. (RCOG)

1) Pelvic pain in the second trimester: how common and what it feels like

Pelvic pain is discomfort felt across the pelvic ring—the pubic bone in front, the sacrum and tailbone at the back, and the hips. In pregnancy, this often shows up as pelvic girdle pain (PGP), and when it centers at the front joint where the pubic bones meet, it’s commonly called symphysis pubis dysfunction (SPD).

What it can feel like:

Pubic symphysis pain in the center front of your pelvis (near the bikini line)
Aching or sharp pain in the hips, low back, groin, or inner thighs
Clicking, grinding, or a “wobbly” feeling in the pelvis when walking or turning in bed
Pain that flares with walking, stairs, standing on one leg, getting in/out of a car, or rolling over in bed (RCOG; Cleveland Clinic)

How common is it? About 1 in 5 pregnant people experience PGP, and some estimates suggest up to 1 in 4 may be affected (RCOG; Cleveland Clinic). The good news: although symptoms can be very uncomfortable, PGP itself is usually not harmful to your baby (RCOG).

2) What causes pelvic pain in the second trimester? Hormones and mechanics

If you’re searching for “second trimester pelvic pain causes,” the answer is a mix of hormonal changes and mechanical load.

Hormones that loosen ligaments: During pregnancy, relaxin, estrogen, and progesterone rise, softening ligaments and connective tissues to prepare the pelvis for birth. This increased laxity can reduce joint stability—especially at the sacroiliac joints (back) and the pubic symphysis (front)—and contribute to pain (NCBI; Cleveland Clinic).
Changing posture and gait: A growing uterus shifts your center of gravity and often changes how you stand and walk, increasing strain through the pelvis and spine (Mayo Clinic).
Increased weight and uterine growth: Baby’s growth and overall weight gain add load to the pelvic ring, magnifying small alignment issues (RCOG).
Core and pelvic floor changes: Abdominal and pelvic floor muscles adapt to pregnancy. If these muscles are weak, tight, or not coordinating well, the pelvis can feel less supported (NCBI).

In short, hormones soften the ligaments, while posture shifts and added weight increase stress on the joints. Together, these factors can irritate the pelvic girdle and cause pain—particularly in the second trimester when growth accelerates.

3) PGP vs. SPD: understanding the pelvic joints

The pelvic girdle forms a ring with three key joints:

Two sacroiliac (SI) joints at the back
One pubic symphysis at the front

Pelvic girdle pain (PGP) is an umbrella term for pain in one or more of these joints. Symphysis pubis dysfunction (SPD) is a subtype focused at the pubic symphysis.

Hallmarks of SPD:

Localized tenderness over the pubic bone
A “wobble,” click, or grinding at the front of the pelvis
Pain that spikes with single-leg activities, wide steps, stairs, or turning in bed (RCOG; Cleveland Clinic)

PGP can include SI joint pain, pubic symphysis pain, or both. Many people notice symptoms on one side first, then spreading with certain movements.

4) Who is more at risk for second-trimester pelvic pain?

Anyone can develop pelvic pain in pregnancy, but risk is higher if you have:

A prior back or pelvic injury or previous PGP
Joint hypermobility
Multiparity (previous pregnancies)
Higher BMI
Physically demanding work or long periods of standing
Poor core stability or muscle imbalances

If these apply, bring them up early with your provider; proactive support and physiotherapy can help reduce symptom severity (RCOG; NCBI).

5) When to call your provider: red flags you shouldn’t ignore

Typical PGP is musculoskeletal and not dangerous. However, contact your healthcare professional urgently or seek immediate care if you have:

Vaginal bleeding or fluid leakage
Fever, chills, or a feeling of being very unwell
Regular contractions or new, persistent cramping
Burning or pain with urination (possible UTI)
Severe one-sided pelvic or abdominal pain
Sudden calf pain, swelling, warmth, or redness (possible DVT)
New numbness, weakness, or trouble walking that doesn’t match usual PGP patterns
A fall or trauma to your abdomen or pelvis

Timely assessment helps rule out non-musculoskeletal causes and keeps you and your baby safe.

6) How pelvic pain is diagnosed in pregnancy

Diagnosis is largely clinical:

History: where the pain is, what aggravates it, how it affects sleep and daily tasks
Physical exam and functional tests: gentle palpation of the pubic symphysis and SI joints; observing gait; pain with single-leg stance; bed turning; step-ups
Rule-outs: Your team may check for other causes—like UTI, hernia, or gynecologic conditions—based on your symptoms
Imaging: Usually not needed. If necessary, ultrasound or MRI may be considered; X-rays are rarely indicated in pregnancy for PGP (RCOG).

Your midwife or OB can refer you to a physiotherapist specializing in pregnancy-related musculoskeletal care—often the most helpful next step (RCOG).

7) Everyday adjustments that help right now

Gentle, consistent tweaks to movement patterns can lower pain quickly.

Pace your day: Alternate activity and rest. Break big tasks into chunks.
Dress smart: Sit to put on underwear, trousers, and shoes (avoid standing on one leg).
Bed mobility: Keep your knees together as you turn; use your arms to help. Consider silky pajama bottoms to reduce friction.
Car strategy: Back in until you’re seated, then swivel both legs in together.
Stairs: Go one step at a time, leading with the less painful leg, or go sideways placing both feet on each step. Avoid carrying heavy loads up/down stairs.
Footwear: Choose supportive, cushioned shoes; avoid high heels.
Sleep setup: Side-lying with a pillow between knees/ankles and another under the bump for alignment.
Heat/ice: Apply a warm pack or brief ice sessions to sore spots as needed.
Pelvic support belts: May reduce pubic symphysis pain and improve function. Use under guidance to ensure proper fit and timing (RCOG).

Small changes—like sitting to get dressed or keeping your knees together during transfers—often deliver outsized relief.

8) Safe exercise and physical therapy options

Staying active is beneficial in pregnancy and can ease PGP when tailored to your needs. The American College of Obstetricians and Gynecologists supports regular aerobic and strength activity in uncomplicated pregnancies, with modifications as needed (ACOG).

Helpful components (guided by a pelvic health or musculoskeletal physiotherapist):

Pelvic floor (Kegels): Gentle, coordinated contractions and full relaxations help support the pelvis.
Transverse abdominis activation: Breath-linked deep core work improves stability (NCBI).
Glute strength: Bridges, supported sit-to-stands, and gentle clams (pain-free range) help stabilize the SI joints.
Gentle mobility: Cat-cow, hip rocks, and thoracic rotations that don’t provoke pain.
Hydrotherapy: Pool exercise unloads the pelvis and allows comfortable movement (RCOG).
Manual therapy: Pain-free joint and soft-tissue techniques can restore balanced movement patterns (seek a clinician trained in pregnancy care) (RCOG).

Activities to limit or avoid (especially during flares):

High-impact exercise (running, plyometrics)
Wide stances, deep squats, or lunges that provoke pubic pain
Single-leg loading that increases symptoms (e.g., step-ups), unless well-supported and pain-free

Sample 10–12 minute mini-routine (stop if pain worsens): 1. 2–3 minutes diaphragmatic breathing with gentle pelvic floor engagement on exhale 2. 8–10 pelvic tilts or cat-cow 3. 2 sets of 8–10 bridges (small range), pause to activate glutes 4. 2 sets of 8–10 heel slides or marching in place while seated, maintaining neutral pelvis

5. Finish with side-lying hip squeezes: place a pillow between knees, gently press knees together for 5 seconds, 8–10 reps

9) Pain relief: medications and complementary care

Paracetamol/acetaminophen: Often considered first-line for pregnancy pelvic pain relief; use the lowest effective dose and confirm with your clinician based on your health and pregnancy stage (RCOG).
Heat/cold: Warm baths or packs, or brief icing, can reduce pain and muscle guarding (RCOG).
Acupuncture: Some find it helpful for PGP; choose a practitioner experienced in pregnancy care (RCOG).
Stronger options: If pain significantly limits function or sleep, discuss next-step medications or strategies with your obstetric provider.

Always check with your care team before starting any medication or complementary therapy.

10) Planning for labor and birth with PGP/SPD

Most people with PGP have vaginal births without complications. Cesarean birth is not routinely recommended for PGP alone and may prolong recovery (RCOG).

Preparation tips:

Add PGP to your birth plan and tell every member of your team on arrival.
Positioning: Choose positions that keep legs supported and avoid forced wide abduction (e.g., side-lying with pillows, all-fours, or using a birth ball with knees closer together).
Water in labor: A birthing pool can offload the pelvis and improve comfort.
Transfers: Request help turning or repositioning; keep knees together and move as a unit.
Pain relief: Discuss options in advance in case hip/pubic pain flares during labor.

11) Partner support and home setup

Practical, compassionate support makes daily life easier.

Share the load: Swap or pause chores that involve lifting, carrying laundry, or lots of stairs.
Plan rest breaks: Arrange seating at work and home; schedule short pauses between tasks.
Car and stairs: Park closer; plan fewer stair trips; carry light, balanced bags.
Comfort aids: Help set up pillows for sleep, heat/ice packs, and a footstool for seated tasks.
Emotional support: Validate the pain; celebrate small wins; accompany appointments when possible.
Track symptoms: Note what eases or worsens pain to share with your physiotherapist.

12) Postpartum recovery and prevention for next time

Outlook and next steps:

Most improve after birth, but around 1 in 10 may have ongoing symptoms needing continued care (RCOG).
Book follow-up physiotherapy: Rebuild deep core and pelvic floor function, then progress to whole-body strength.
Gradual return: Increase walking and exercise volume slowly; prioritize form over intensity.
Clot prevention: If mobility is very limited, ask your provider about supportive stockings or medications to reduce thrombosis risk (RCOG).
Future pregnancies: Preconception strengthening of glutes, deep core, and pelvic floor, plus early physiotherapy in pregnancy, can lower recurrence risk (RCOG).

The bottom line

Second trimester pelvic pain causes are typically a blend of hormone-driven ligament laxity and the mechanical demands of a growing pregnancy. With early assessment, everyday adjustments, and targeted physiotherapy, most people find meaningful relief—often quickly. And while PGP can feel intense, it usually isn’t dangerous to your baby.

If pelvic pain is limiting your day or disturbing your sleep, tell your provider and ask for a referral to a pelvic health physiotherapist. With the right plan, you can stay active, prepare confidently for birth, and protect your long-term recovery.