is a serious problem for many older adults and it usually requires medical evaluation and treatment. The doctors who would be best able to discuss this issue include an internal medicine doctor
. Although the various forms of arthritis can cause many symptoms, they do not cause low blood pressure or dizziness. However, it is very possible that one of the medications that your mother is taking for her arthritis or another condition is the cause. In fact, the number one cause of dizziness and low blood pressure in older adults is medications! Another possibility is that, given her limited mobility, she has become somewhat deconditioned. This could lead to dizziness and fatigue when standing from pooling of blood in the legs. This symptom can be managed by making sure she changes position slowly. This symptom clearly needs to be investigated thoroughly. While it is being worked up it is very important that she take special care. Dizziness can lead to falls and bone fractures, which would be devastating in your mother's case. As always the diagnosis and the management of this particular concern will require a physical examination by your mother's personal physician. Setting up a visit to discuss these symptoms is highly recommended.