Cramps in the feet, calf muscles and thighs is common in later pregnancy, especially at night-time.
The cause of cramps isn’t known. You may notice them more if you exercise during bouts of hot weather or if you wear high-heeled footwear.
If you suffer from cramps, try to avoid pointing your toes, and overexerting yourself in hot weather. In addition, regular gentle exercise to improve circulation, massaging or rubbing the affected area firmly, stretching your calf muscles by flexing your feet upwards and rotating them and sticking to low-heeled footwear may also provide relief or prevent cramps.
The cramps will do you no harm, and will disappear after the baby is born. There are so many remedies for cramps that no one is a panacea; you simply have to experiment with the above suggestions.
Stretching the muscle before getting into bed at night does, however, appear to reduce the number of cramps.