Hello and Welcome to Healthcare magic Forum! If you are 47 years old, Did you get your BP and Sugar levels checked, Common cause for pain in the feet at this age could be Vit D deficiency, or increased uric acid levels in blood and even High Sugar levels. I would suggest you to take the following Blood tests: FBS, PPBS, Serum Uric Acid, Serum Creatinine, Serum Vit D After the evaluation of these we can be able to come to a final diagnosis, since you are complaining of the foot pain being more after you first stand up it seems like a circulatory problem, when it gets better after the blood flow resumes normally to your feet when u walk around, and also the exhaustion you facing seems to have come from defective metabolism where your body slows down in detoxification process and even when u r at rest your body doesn t get enough rest making you feel exhausted, So you need to detoxify your liver with Beetroots, carrots n spinach or green leafy vegetables, green tea, avoid sugar n artificial sweeteners, diet sodas, carbonated drinks and especially caffein. Hope this helps! Wishing you good health