Pain in the coccyx is a common symptom that can range from a mild ache to a sharp, stabbing sensation. It is often caused by sitting for long periods of time or by trauma to the area. It can also be caused by pregnancy, childbirth, or certain medical conditions. Pain in the coccyx can manifest as a constant ache, a sharp pain when pressure is applied, or a burning sensation. It may also be accompanied by swelling and tenderness.