hi asha. leg pain or cramping is common during pregnancy. i too had this pain. my doctor has told me this is due to vitamin d deficiency and recommended medicine which needs to be taken in a week only. however you can apply coconut oil or badam rogan oil and massage it from upwards to downward direction very softly so that veins or nass of the effected area gets soften and you can sleep easily. try to elevate your legs while sleeping. for this use pillows below your feet to elevate them. use foot rest while sitting.

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