Hi, Thanks for placing your query here. I can appreciate your concerns. It seems she has got Coccydynia ,a type of lower back pain felt around the last bone at the base of the spine (known as the coccyx or tailbone). The cause may be related to local trauma,age related wear & tear or sometimes unexplained. Apart from taking painkillers & If this fails,steroid injections can be recommended. There are a number of things you can do yourself to help with the pain, including using specially designed cushions to support the coccyx. Spinal manipulation techniques such as physiotherapy, osteopathy and chiropractic can also provide relief from pain. Hope I have answered your query. If you have any further questions I will be happy to help. Wish her good health.