The tailbone pain, coccyx pain, or prenatal lower back pain, also known as coccydynia, is a sharp or dull pain at the end of the spine. If the pain is severe, it is called ‘bruised tailbone.’ Some pregnant women might experience this pain due to various reasons. Although there is no cure for this pain, some simple stretching exercises could help in reducing the pain to some extent.
Source: MomJunction