Does anyone else knees ache since giving birth? My knees have this slight ache every time I stand up.

I do have an aching feeling on my knees too. i believed it's the weight that we bear during our pregnancy time. I have yet to consult doctors over this issue, i am drinking more milk and calcium related stuffs to strengthen my bones and try not to stand up too fast or carry overweight stuffs to prevent more strain on my knees. Avoid heels for the time being too