A sudden, sharp cramp in your calf muscle jolts you awake, then leaves a dull ache for a few minutes even after it's gone — a very familiar scenario for many pregnant women, especially in the second and third trimesters, and often specifically at night.
What might cause it?
The exact cause isn't fully certain, but extra weight, the growing uterus pressing on nerves and blood vessels supplying the legs, and circulatory changes are all thought to contribute. Some studies also link it to a possible magnesium or calcium shortfall, though that link isn't definitively confirmed.
What do you do when it hits?
- Straighten your leg immediately and gently pull your toes toward your knee until the tightness eases.
- Massage the tight muscle with firm strokes, or apply a warm compress.
- Stand and take a few steps if you can — it helps the muscle relax faster.
How do you reduce how often it happens?
- Drink enough water throughout the day, since dehydration raises the odds of cramping.
- Gently stretch your calf muscles before bed every night.
- Avoid standing still for long stretches, and flex your ankles regularly when sitting for a while.
- Discuss adding a magnesium supplement with your doctor if the cramps are frequent and disruptive.
These cramps are annoying but usually not dangerous. If they come with severe swelling or redness in one leg specifically, talk to your doctor to rule out anything else that deserves follow-up.
