Brief Answer: Suspected secondary carotenoderma but require a physical examination of foot by physician to rule out diabetic foot. Detailed Answer: Warm Welcome. I appreciate your trust in HCM and assure you are on best portal on the globe for expert online medical services. I have thoroughly reviewed health query you raised, and well realize all of those concerns. Being your physician, I will take care all of them today and will extend my expertise to solve the problems. As you are diabetic, colour changes in skin of foot is concerning and warrants a physical examination by physician. There are also some queries you need to answer to like: • Is your sugar level maintained? • Have you noticed decreased sensation or tingling in foot? If early diabetic foot changes are ruled out, then it is most likely to be secondary carotenoderma. High carotene levels result in orange tint of skin. You have both diabetes and hypothyroidism which are linked to it. Carotenoderma itself is harmless and require no treatment. Hope I addressed all the concerns you have. Let me know if you have further questions. I will be more than happy to clear any doubts. Keep a follow up to see how you doing. Regards! Dr. Ali Raza