👉 Blennorhea is a condition in which the skin grows thicker and more dense, often with a yellowish color. It can occur on the face, neck, or hands, but it's more common on the back and legs. Blennorhea can also be caused by other medical conditions such as diabetes, certain medications, or hormonal imbalances. The condition is usually harmless to the skin, but if it becomes severe, it may require medical attention.