Thank you for reaching out to us regarding your father's symptoms of cold feet and soreness after walking. We understand how concerning these symptoms can be, and we're here to guide you through the next steps.

Based on the symptoms you've described, it's possible that your father may be experiencing circulation issues, such as peripheral artery disease (PAD). There are two common diagnostic tests that can help assess his condition:

1. Doppler Ultrasound: This test uses sound waves to evaluate blood flow in the arteries and veins. It can detect blockages or narrowing in the blood vessels, which could explain the coldness and soreness in the feet.

2. Ankle-Brachial Index (ABI): This is a simple, non-invasive test that compares blood pressure in the ankle to that in the arm. A lower ABI value may indicate poor circulation, which could be contributing to his symptoms.

To further evaluate your father's condition, we recommend consulting with a orthopedic consultant or a vascular specialist depending on your main concern. 

Any advice, recommendations, or information provided by the Company, its affiliates, employees, moderators, medical practitioners, and representatives within the Forum is not to be taken as conclusive advice. It is intended as a suggestion and not a substitute for consulting with qualified medical practitioners. Users are encouraged to seek professional advice tailored to their specific circumstances.