Leg Cramps
Sudden, painful muscle contractions in calves and feet, especially at night. Common in second and third trimesters.
Sources: ACOG, NIH | Last updated: March 2026
📅 When It Occurs
Typically begins second trimester, most common in third trimester, especially at night
📊 How Common
Affects about 50% of pregnant women
Overview
Leg cramps during pregnancy are sudden, involuntary muscle contractions that typically affect your calf muscles, though they can also occur in your feet and thighs. They're most common at night and can jolt you awake with intense pain.
These cramps usually begin in the second trimester and become more frequent and intense in the third trimester. While the exact cause isn't fully understood, they're likely related to fatigue, pressure from your growing uterus, and changes in circulation.
Though painful and disruptive to sleep, leg cramps are harmless to you and your baby. However, persistent pain in one leg could indicate a blood clot, which requires immediate medical attention.
📆 By Trimester
First Trimester
Rare, usually not an issue yet
Second Trimester
May begin to occur, usually manageable
Third Trimester
Most common and intense, especially at night
🔍 What Causes It?
- •Excess phosphorus and reduced calcium or magnesium levels
- •Fatigue from carrying extra weight
- •Growing uterus putting pressure on nerves and blood vessels in legs
- •Reduced circulation in legs
- •Dehydration
- •Prolonged standing or sitting
- •Changes in calcium metabolism
💡 Relief Strategies
- ✓Stretch calf muscles before bed - stand facing wall and lean forward
- ✓When a cramp occurs, straighten leg and flex foot toward shin
- ✓Massage the cramped muscle firmly
- ✓Apply heat to cramped muscle after stretching
- ✓Walk around to restore circulation
- ✓Drink plenty of water throughout the day
- ✓Ensure adequate calcium intake (1000mg daily) through dairy or supplements
- ✓Consider magnesium supplements (300-400mg daily) with doctor approval
- ✓Wear supportive shoes during the day, avoid high heels
- ✓Elevate legs when resting
- ✓Do regular prenatal exercise to improve circulation
- ✓Try a warm bath before bed to relax muscles
🛍️ Comfort Products That May Help
Comfort and preparation products other expecting parents find helpful at this stage. These are convenience picks, not medical advice — always follow your provider's guidance.
Maternity Compression Socks
Gentle graduated compression many moms wear for tired, swollen legs and feet.
Check Price on Amazon →Full-Body Pregnancy Pillow
U-shaped support for side-sleeping that helps take pressure off hips and back.
Check Price on Amazon →Motivational Water Bottle
Staying hydrated eases many pregnancy aches; a time-marked bottle makes it easy.
Check Price on Amazon →Amazon Associates Disclosure: As an Amazon Associate, we earn from qualifying purchases at no extra cost to you. These recommendations are editorially chosen comfort and preparation products and are not medical advice.
⚠️ When to Call Your Doctor
Contact your healthcare provider if you experience:
- ⚠Persistent pain in one leg that doesn't go away
- ⚠Leg swelling, warmth, redness, or tenderness (possible blood clot)
- ⚠Calf pain that worsens when walking
- ⚠One leg significantly more swollen than the other
- ⚠Cramps so severe and frequent they significantly disrupt sleep
📅 Explore by Trimester
Learn how this symptom and others change throughout your pregnancy journey: