Pain in the lower back and hip radiating down the back of the thigh into the leg, initially attributed to sciatic nerve dysfunction (hence the term), but now known to usually be due to herniated lumbar disc compromising the L5 or S1 root.See: sciatic. (Contugno), Domenico Felice Antonio, Italian anatomist, 1736-1822.ain in the lower back and hip radiating down the back of the thigh into the leg, initially attributed to sciatic nerve dysfunction (hence the term), but now known to usually be due to herniated lumbar disc compromising the L5 or S1 root. See: sciatic. (Contugno), Domenico Felice Antonio, Italian anatomist, 1736-1822.
Dark spots are the result of the overproduction of melanin (skin pigment). It's not fully understood why dark spots develop, but aging and UV light exposureâeven exposure to artificial UV light, like the kind used in tanning bedsâare major causes. Dark spots can develop anywhere, but they are most likely to appear on the parts of the body that receive the most sun exposure, including: 1  The face. 2  The backs of the hands. 3  The shoulders. 4  The arms. 5  The back.
How to Cover Dark Spots on the Face Photo Credit Sarah Vantassel/Demand Media. Dark spots on your face come from aging and sun exposure. Age or sun spots arise when melanin, the pigment in the skin that deepens with tanning, accumulates in one area.Dark spots take years to develop, and once in place must either be covered cosmetically or bleached.se a liquid product close to the same shade as your skin color. Dab the makeup onto your fingertips and smooth the makeup over the surface of your face. Blend the makeup well. Do not focus on the dark spots. Foundation is meant to even out the overall color of your skin.