Thanks for your patience.
Purples knees and elbows reminds me of
psoriasis. Is the skin
itchy and scaly?
The low blood pressure with high heart rate and a
headache is of more concern. It would be good to have her evaluated by a physician ASAP who can check her blood pressure in different positions (supine, sitting and staning). If we see a decrease in blood pressure with an increase in heart rate then we may diagnose orthostatic hypotension. The next task would be to find out the cause (eg medications, dehydration,
anemia, cardiac etiology).
Keep us posted.
