The shoulder and hip joints are the only ball-and-socket joints in the human body due to the need for great motion at the end of the bodyâs limbs and the vast amount of musculature needed to move and support such flexible joints.
A sudden drop in blood pressure can be caused by a rapid change in health or certain medications. It may also signify an underlying medical problem such as thyroid issues. As long as there are no symptoms, low blood pressure in an otherwise healthy person generally is not a concern.
Some medical conditions can cause low blood pressure. These include: 1  Pregnancy. 2  Because a woman's circulatory system expands rapidly during pregnancy, blood pressure is likely to drop. 3  This is normal, and blood pressure usually returns to your pre-pregnancy level after you've given birth.