I need medical guidance for a 60-year-old female. She is experiencing the following symptoms: - Pain in the calf muscles (especially in the legs) - Tingling sensation (pins and needles) in the ankles/feet - Stiffness and cramping in the hands during sleep (hands become rigid at night) Please analyze the possible causes (both common and serious), and suggest: 1. Most likely diagnosis 2. Required tests for confirmation 3. Immediate home remedies or management 4. When to consult a doctor urgently Also, if possible, include both modern medical and Ayurvedic perspectives.