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.
Black spots in vision as a result of the aging process. If the person experiencing the black spots in vision is over 50 years of age, then they may as well relax because this is a fairly common consequence of the aging process. The black spots that this group of people experiences are called eye floaters, which are the kind of tiny specks floating in the field of vision. The reason this happens is due to the shrinking of the eyeballs which is quite inevitable in that particular stage of life.