Hi, It seems that you are having dry eczema..lichen simplex chronicus. The skin in lesion is thick,black and severely itchy. There may be many causes. Contactants like soap,dust,housedust mite,pollens,cosmetics,clothes,wool,grass, Perfume..so on... Dietary factors like cow milk,peas and nuts,sea food,eggs,colored drinks,fermented food..etc might exacerbate the lesions. Inhalants like fume,pollutants,perfume..etc may be responsible. I feel, you may be having atopic diathesis. Stress and mental upsets may worsen the condition. Antihistaminics like levocetirizine reduces itch sensation. Steroids in tappering dose would be very helpful in relieving the disease. If there is bacterial infection, add antibiotics. Apply steroid cream for long time. If needed, intradermal steroid injection may be taken. Keep the skin moist with moisturiser. Consult dermatologist. I hope you got my answer. Thanks. Dr. Ilyas Patel Md