Hello,
It can be due to contact dermatitis, viral infections, diabetes, hypothyroidism, and hypoparathyroidism. They can also be due to peripheral vascular disease, vitamin B12 deficiency or malnutrition.
Get your blood sugar and thyroid hormones levels evaluated. You can take some vit B12 for some days and see if the symptoms are gone or not. In case the symptoms persist then please consult a dermatologist/ physician.
It is very difficult to precisely confirm a diagnosis without examination and investigations and the answer is based on the medical information provided. For exact diagnosis, you are requested to consult your doctor. I sincerely hope that helps. Take care and please do keep me posted on how you are doing.
I'm not sure, but I would definitely go to the doctor. Sounds like something they are going to need to check out. good luck