Hello,
From your description I can deduct that your father has
hypothyroidism caused by a condition called Hashimoto's thyroiditis. Generally, the thyroid diseases do not cause black spots on the body. Anyway, I can say that there is a connection between an
autoimmune thyroid disease like Hashimoto's thyroiditis and an autoimmune skin condition called vitiligo.
Vitiligo is a disease in which the pigment cells of the skin are destroyed in certain areas. Symptoms and signs of vitiligo include loss of skin color in the form of depigmented or white patches of skin in any location on the body. The treatment in your father's circumstances is thyroid
hormone replacement therapy or Levothyroxine. This medication will help to normalize the symptoms of thyroid
hormone deficiency but the spots in his skin probably will not disappear (if the skin condition is vitiligo).
Anyway my advice is to consult physically a
dermatologist in your area for the right diagnosis / treatment of his skin condition and an
endocrinologist for the prescription of Levothyroxine, the right doses and the follow up of his thyroid condition. Let me know if I can assist you further.
Take care. Hope I have answered your query. Let me know if I can assist you further.
Thank you.
Regards,
Dr. Elona Xhardo
Endocrinologist