Which condition is characterized by white hair and skin along with reduced or absent eye pigmentation due to a lack of melanin?

A. Elevation of the legs increases pain in those with varicose veins is incorrect because elevating the legs actually relieves discomfort. Elevation reduces venous pressure and improves blood return to the heart, which decreases pain, swelling, and the feeling of heaviness in the legs.

B. The main cause of varicose veins is atherosclerosis is incorrect because varicose veins are primarily caused by venous valve incompetence, leading to venous dilation and blood pooling, not by arterial plaque buildup. Atherosclerosis affects arteries, not veins.

C. Individuals with varicose veins are not likely to develop peripheral edema is incorrect because venous insufficiency can cause fluid to accumulate in the tissues, leading to peripheral edema, particularly in the lower extremities after prolonged standing or at the end of the day.

D. Standing for long periods of time increases the risk of developing varicose veins is correct because prolonged standing or sitting without movement increases venous pressure in the legs, which stresses vein walls and valves. Over time, this can lead to valve dysfunction, vein dilation, and varicose vein formation. Other risk factors include obesity, pregnancy, aging, and family history.

A. Ringworm is incorrect because ringworm (tinea) is a superficial fungal infection of the skin characterized by circular, scaly, and often itchy lesions. It is caused by dermatophytes and is not primarily an inflammatory reaction to irritants.

B. Eczema is correct because eczema, also known as atopic dermatitis, is a chronic inflammatory skin condition that results in redness, itching, and increased sensitivity to environmental irritants such as soaps, detergents, certain fabrics, or changes in temperature and humidity. The skin barrier is compromised, making the skin more prone to irritation, dryness, and secondary infections. Eczema often follows a relapsing course with flare-ups triggered by allergens or irritants.

C. Psoriasis is incorrect because psoriasis is a chronic autoimmune condition characterized by rapid proliferation of skin cells, leading to thick, silvery, scaly plaques. It is not primarily caused by external irritants, although trauma or stress can exacerbate it.

D. Impetigo is incorrect because impetigo is a highly contagious bacterial infection of the skin, typically caused by Staphylococcus aureus or Streptococcus pyogenes. It presents as vesicles or pustules that rupture and form honey-colored crusts. It is an infectious condition, not a chronic inflammatory response to irritants.