Foot Spot -- Seek an Expert
I suggest consulting with a board certified dermatologist for an in person evaluation and treatment. This looks like blood under the skin and would be best evaluated. Best, Dr. Emer
Thank you for your question. I cannot diagnose or tell you what the lesion is through photographs because the spot needs to be evaluated with an instrument called a dermatoscope, which allows a physician to assess the lesion under higher magnification. Could your husband be correct that the lesion is dried blood under the skin? Possibly. But could it be a mole? Possibly. I understand new or rapidly changing lesions are worrisome, therefore, I highly recommend you consult with a board certified dermatologist to have your lesion evaluated, and if there are any abnormalities, then a biopsy should be done. Take care and good luck.