Whether it is because of too much of environmental stress and chafing, or due to not wearing a good sunscreen, or even lack of proper care of exfoliation, dark elbows and knees are quite common in women. Home remedies work well in reducing darkness of knees and elbows. Want to know how to treat roughness and darkness of elbows and knees, read on further: What Causes Dark Knees and Elbows: Allergic reaction. Not wearing a good sunscreen. Hormonal factors. No proper…