<s>[INST] I m 35 weeks pregnant and for a time now have had throbbing pain off and on - both in my back and strangely, around my left clavicle . I broke the clavicle in a car accident 5 years ago and had it plated until it was healed, the plate was then removed. It doesn t normally give me any trouble but when I have this throbbing in my lower back, it seems as strong in the clavicle area. It s not even necessarily very painful - although its a very thin line between being painful or not, and it is a very strong, pulse . Could this be linked to blood pressure? When I had it checked 2 weeks ago, my bp was fine, as it has been throughout my pregnancy. I could understand the back pain , but particularly confused as to why my clavicle would be throbbing. Thanks. [/INST] Hi Haida. It is natural to have some off and on BCK pain at your stage of pregnancy. So no need to be worried about that unless its severe or persistently bothering. As the pregnancy progresses, the heart and lungs in the chest cavity are pushed upwards and also there are a lot of changes that take place in the circulation and blood volume. The throbbing the you feel in your left clavicle region may be due to the heart and big blood vessels moving upwards, which is normal for you. As you have been operated twice on left clavicle, there may be some hypersensitivity due to the scarring there. But nothing seriously seems wrong. Do get your regular checkups and mention this to your obstetrician. Wish you good luck. </s>